Yes and no, Wigs. It can be frustrating to feel that you have to keep up the same pace as others, and that can be more uncomfortable than "getting your feelings hurt" by being in a "slower" group.
But there are a few caveats. Although skiiing with the brakes on is sometimes a sign of inefficient skill, skiing fast is not always
a sign of proficiency.
Two weeks after last year's academy, I decided, as suggested by a Sugarloaf instructor, to advance to their blue/black group.
On the first run, I was a bit slower than the rest of the group, so I asked the instructor if I should go back to the blue group. His answer was an emphatic NO, and he pointed out that some of the other skiers in our class may have been fast, but were completely out of control. On one run, he actually made them follow my pace, which was sort of weird! At that point, I had seen how some of them had an uncanny ability to knock out anyone in their path. Got me to speed up, though, out of self preservation!
There is another factor that comes into play. If the person who skis at a slower pace just about never wipes out, but the faster skiers have collected major "frequent falling miles" nobody is going to be waiting around very long for anyone.
In answer to Nolo's question, I really think that there are a number of ways that this can be done. But each manner of split will have its own stipulations. It may be necessary to do a few runs prior to regrouping. Here are the possibilities:
Trails (green blue black, allowing for variances within each trail, i.e easy hard, etc.)
Type of turn
Type of terrain: Curiously, I know of many skiers who are far more skilled than I am, but have no desire to ski bumps, powder, etc.