Are they though? I don't think development is linear like that. Actually the Leafs current draft philosophy is that players go through "bursts of development" and is what they've been trying to capitalize on with all the older kids they drafted this summer.
Agree - you can probably generalize that the average person who started playing at 5 will be ahead of the average person who started playing at 14 when they're 17/18, but I think anyone who's in a position to be drafted to the best league in the world and is playing in one of the traditional development leagues (CHL, NCAA, USNDP, Sweden/Finland/Russia/etc) will have made up that ground by draft day or they wouldn't be where they are - ie. David Levin for 2018.
Funny how the draft strategy seems to have changed in a year - 2015 the leafs took a bunch of guys who it looked like they were trying to predict would break out: Neilsen, Dzerkials, Lindgren, Korostelev....then 2016 switched to guys who were over-agers who already had the development/production bursts
I know its just a highlight reel in a short tournament, but it doesn't look like he does anything badly now. Looks slick carrying the puck, his skating seems to have improved drastically, good wrister and booming slapshot, demonstrated some very nice vision (although I think the slap-pass just before the 3 min mark was an accident, the Bracco breakaway setup was beauty)
Looking very forward to seeing this kid in the AHL