CHL Scoring:
1213
Q: 6.98GPG
O: 6.49GPG
W: 6.42GPG
1112
Q: 7.15GPG
O: 6.9GPG
W: 6.8GPG
1011
Q: 6.7GPG
O: 7.25GPG
W: 6.76GPG
0910
Q: 6.92GPG
O: 6.95GPG
W: 6.53GPG
0809
Q: 6.88GPG
O: 6.86GPG
W: 6.51GPG
0708
Q: 6.84GPG
O: 6.88GPG
W: 6.01GPG
So WHL has been lowest every year but 1011, where it was middle.
Q has been highest 3 years, lowest 1 year, middle 2 years.
OHL has been highest 3 years, middle 3 years.
Apart from last year where Q was far higher scoring, and 1011 when O was almost the same the opposite way, Q and O are very similar.
Even with a 0.5GPG difference (as last year and 1011) the impact on individual players is not that big.
Looking for example at Straka last year, that is an extra 34 points a year for him from playing in the Q instead of OHL.
(very basically, not looking at individual team scoring, just overall. 0.25GPG per team difference between OHL and QMJHL, so each team gets an extra ~17 goals per season than the OHL, so an extra ~40 points per team, so top line players like Straka got about a 34 point boost (assuming top 3 get ~2030% of team points, which is about usual.)
