Thanks for the response. As you know there is a giant chasm between 30 and 60 points, so I wanted to make sure the analysis wasn't aiming too high. I guess the bottom line is even the crappiest NHLer was very productive as a junior.
There is a good reason for that.
The NHL game is sooooooo fast. You have to have quick thinking and quick hands to make even the simplest of plays in the NHL. To control the puck for a few seconds.. to make a "safe pass" ... to chip the puck off the glass.... a minimum skating speed and agillity required to keep up with the play and not fall behind, not get burned to the outside every time.... a minimum of vision and awareness to be in the right spot and play your position.... there is a minimum skill level required to do these things even for fourth liners. Thats why the Goons who could only fight and can't play, are really exposed when they get more ice time.
That minimum level of skill, when you play at lower levels, and arent playing NHL competition, it reveals itself in scoring points.
You also have the fact that there are ~60 CHL teams, plus the US NTDP, plust the USHL, USHS, NCAA, plus Europe, plus the odd Junior A players who get drafted.... thats a lot of different development routes to the NHL. Plus the max career for a CHLer is 5 years, and for most who are drafted and legit NHL prospects the max junior career is 4 years before they go to the AHL.
Thats a funnel of a huge number of teams.... getting split down to just 30 NHL teams.... whose players also have longer careers.
So if you are on the third line of your own junior team. Why are NHL teams taking you over the guys on the first two lines? Especially since we see it in international competition all the time... plenty of good NHL scorers become good 3rd/4th liners for Team Canada playing grinding roles in the Olympics... good hockey players adapt. Same thing happens in junior. The 1st line OHL player, if he can't make an NHL top 6 will adapt his skills, be better defensively and learn to be a 3rd or 4th liner, while the 3rd or 4th line OHL player will be surpassed for the same NHL job, by the kid who was a better player than him in the OHL.