I agree with Skrimskraw that the in game stats are not useful, the same as the in game ranking is not necessarily useful on determining what a good player they are. Many go achievement whoring, but really are not that good. I also know players, names of which I will not mention here, refuse to lose a game, and will only play on stacked teams, or leave after 1 lose. Many times the in games are very causal, and people are trying out new tactics, and such. It might make them afraid to do that if they know everyone is tracking their in game stats.
If you are using real competitive play stats that would be useful, but there is no central hub for that. Grayknight had offered do just that, and start taking down, and track wins and loses in competitive play. it would seem no one hit him up on that gracious offer.
