Don't get me wrong here in that I like what you're doing, some great turns and certainly a great addition to the skill toolbox.
But to be clear, the tool box needs to have alot of other tools in it too. Bumps need to have alot of different lines as well.
By the way, the 5 year old rocks! When is Dad going to start him doing his bump line instead of the valleys?
Admittedly, "Proud Parent Syndrome" is another of my many incurable afflictions. My 5 year old is driven to "keep up" with his 10 yr. old brother, whether it is video games or skiing, and is a huge advantage which over time will show up in his learning curve. The only instruction I have given him consistently all season is to "touch and turn", reach out and touch the pole and turn around it. The KIS program (keep it simple) has been very effective as he was only wedging at the beginning of the season. On the groomed, he tries to keep his turn rhythm fluid and uses the built up pressure at the bottom of the turn to rebound/float him into the next turn, he feels it and is learning how to make QCT's. He'll be skiing over the tops within a couple of seasons. I agree, he rocks and it is so much fun to have us all skiing the same runs this year, a real family milestone.
The purpose of the video is to show how beginners naturally gravitate to and learn to navigate the zipperline when attempting to hold a direct fall line in natural terrain. There is no doubt that learning to ski the zipperline is a skill that fall line mogul skiers need to develop and do. It is the lowest route through/around moguls that gravity will pull all skiers to naturally. What I am trying to say is that the zippeline is only a plateau, a level of skiing ability/technique to build on as the skier continues to progress to advanced/expert skiing in natural terrain. What I see is the majority of skiers stop the progression and tend to focus only on navigating the zipperline faster and more proficiently which usually stagnates the skier's technical learning curve. They stop working on making round turns with shovel edge pressure and revert back to utilizing the intermediate pivot/slip/skid which allows them to control higher speeds, but limits them to laterally slamming the mogul side wall for speed control and totally confines them to tracing the zipperline and depending on it in natural terrain. They never leave the zipperline which halts the technique progression.
Developing a solid QCT on the groomed is the most important tool to have in the box when skiing natural terrain. It is easy to loosen up the QCT, bigger radius, slower cadence, which can easily handle varied meandering lines, different tactics. The trick is to "wind up" or tighten the QCT radius and cadence, once this skill is developed, the turn will take the skier down virtually any terrain confidently.
It is using the term carved for check turns that sticks in my craw is all.
If the intent is in fact quick carved turns, then I would suggest being more careful on the videos you post - way to many have
quick checked turns in them.
The vid of the QCT has a bit of both carved and checked short turns in it. The kids seem to have carving down better than the older folks.
at 0:10 alot of the kids are in fact carving (and others are not).
at 1:10-11 carving
at 1:15-19 not carved note how the tips do not move laterally as much as the tails swishing around in back.
at 1:27-30 carved
The kids are all learning how to execute QCT's, as their ages vary, so do their proficiencies.
A check turn is the result of the skis being pivoted weightless through the fall line, which gets the ski almost perpendicular to the fall line as the skier comes down and pressure is applied to the full length of the ski at the same time. A hockey stop or hop turn would be examples. The pivot/slip/skid that most WC bump skiers use would be an example also I guess, but they do typically feather their skidding tails into the bottom of the mogul side wall. Hence slip/skid as the edges check firmly at the bottom of the rut as opposed to an edge set that would lock and drive the skis in an arc across the fall line into a typical carving transition.
The QCT hooks up the shovel edges in the high C as the tails feather behind them and proceed to lock in at the fall line. This is what Felix does consistently in his slalom run. I think racers refer to this as a "stivot". His turns are certainly not consistently Arc-Arc carves. His tails are often in the air as his skis enter the fall line as his edges feather/set into the arc. Slalom turns have a much larger radius than the QCT, so we must execute these movements in a much shorter time frame in order to hold a tight fall line.
Felix sprays the most snow at the bottom of the turn in his most demanding turns, the turn finish, and this is where his edge angles are the greatest. His edge angles don't reduce until he pulls his feet back and releases his skis AT transition, not before. There is no "un-edging" into transition, it defines the start of transition, tha't's how I see it anyways.