Scoresberg
In Trotz We Trust?
Ever since they increased the o-zone size, wingers have had more demanding job defensively. If the opponent comes out of the corner with a puck and you're babysitting the defenseman at the blue line, they can just walk into a good scoring chance with all that added space. If you're too close then the defenseman has a lot of time and space to make plays should the puck get past you.
On the weak side you have to collapse so you can support the slot, but if you're unable to get back to defending the weak side defender if the play shifts to your side again you possibly give up a high danger scoring chance.
Clearing pucks out of the d-zone isn't that simple either. You often have your back against the neutral zone when you receive the puck at the boards with pressure coming from at least the defender behind you and possibly the closest forward.
Centers do have demanding responsibilities as well, I'm just trying to point out it's not like wingers have it somehow easier. Someone who has played their entire life (or at least several years prior to their draft) as a center may be a terrible winger.
Centers are expected to make (quick) plays and support defenders in the d-zone and wingers in the o-zone. This is where getting used to the game speed at wing may be beneficial, thought. If you're unable to make a quick play with a bouncing puck as a winger you can just tie it up at the boards or dump it in. At the same time you get a better idea at how you can support your teammates when you eventually move to center. I'm sure there are other benefits in starting young players at wing I'm unaware of. Why would professional hockey teams with smarter hockey minds do it otherwise?
I know what I said may sound like I'm arguing with myself stating benefits for both approaches, but it's just not that simple and there isn't one universal way that works for everyone. If you're good enough then I lean towards agreeing with @nine_inch_fang, put them straight into the position they've been practicing for years.
Can we sticky this post? Really good info for people who haven’t played hockey themselves and don’t really have a grasp on how different positions differ from each other.