Scouts ALWAYS factor in the competition BEFORE any viewing whether it's USHS, Can Jr. Tier 2, Major Junior, NCAA, or a European men's league. What this means is that you will expect that players in lower leagues will do a bit better against the competition.
But my point is you do NOT mark down a player for that because it's not a feature or quality of that player. A scout would never ever say, "Yeah, Turris seems to me the most skilled player with the most potential but he plays in a lower league so I'll drop him down five notches in my ratings". If you think the player is the biggest talent with the most potential you pick him #1. Period. You would understand of course that he may not have been so dominant if he had been playing WHL or the NCAA or, like Cherepanov, in the top Russian men's league. It's already factored into the scout's mind before watching the game. The bottom line is if you think he's the best player, you pick him.
By the way, I support the view that the top BCJHL teams could match CHL bottom-feeders. Not only are there 17 year olds like Turris going the NCAA route but some very skilled 18-20 year olds who want scholarships too (e.g. Hobey Baker nominee Brandon Wong). There are also 20 year olds who already played in the WHL but have returned to their hometowns/province for work and to play. It's not like a farm team for the CHL, as some think. It's more like a farm team for NCAA hockey and a lot of 20 year olds who plan to stay live, work in B.C.