Maybe you can explain this to me, because I can't seem to find the information on Behindthenet.ca's site, but what determines the "quality" of a teammate/opponent to them?
Is it their corsi rating? their +/-? Their # of pts scored, line designation etc?
Because if they are using Corsi or +/- then the player in question's bad play would bring down the #'s of any teammates playing with him influencing the stat to the point where it would be essentially useless.
The corsi number is (shots on target for + missed shots for + blocked shots against ) - (shots on target against + missed shots against + blocked shots for)
it rewards you for being on the ice, being in the offensive zone, and being effective enough to get a shot off. It penalizes you for being in your own zone and letting the other team take shots. Of course, the best teams will typically have the players with the best corsi numbers.
The relative corsi # tries to compensate for that. It takes the players corsi number and subtracts the team's corsi # for when that player is not on the ice. If you have a +3, it means your team takes 3 more shots with you on the ice than with you off of it. If you have a -3, it means your team takes three less shots with you on the ice than with your off it.
What I take from it is that Kindl is sheltered a bit and Kronwall is overwhelmed a bit. Kindl is routinely put out there against guys who don't spend a lot of time in the offensive zone, while Kronwall is out there against guys who tend to carry more of the play offensively. To Kindl's credit, he's taking advantage of the match-ups.
edit: I should mention that they
also have corsi numbers that take into account what zone a player starts in(offensive, defensive, neutral), but I just sort of lose interest in the number crunching at that point.