This year is my son's first year of skiing. We took advantage of the new skier program at Ski Liberty / Whitetail (in PA) and he's had a lesson every time he has been out this year (12 and counting). He has progressed rapidly and now LOVES to ski everything, including single-black diamonds. The problem is that his form suffers when he's on the harder slopes... he reverts to wedging in his turns. The key here is that he's always in control of his speed and direction, even on the steep slopes.
Recently (the last month) he has been working on 'toe turns' in his lessons, and improving his overall stance. He can toe turn like a champ on the blues, and sometimes on the diamonds. Keep in mind that these are Southern PA diamonds, not VT or CO :).
My question is this - as long as I continue to see improvement on the intermediate slopes, is there any real problem letting him spend some of the day on the harder stuff, even if his form slips a little? We definitely get our 'blue' time in.
My objective is for him to love skiing, not necessarily to make his high-school ski team or win an olympic medal. So far it has worked out... he loves it and I'm hesitant to tell him that he's not allowed to go down the runs that he wants to (given that he has shown that he can handle it without issue). The main reason I ask is that I have a friend who 100% will not let his son near a diamond until he has perfect parallel turns all the time. It got me thinking enough to ask the broader internet.