What do personal win/loss records tell us?
I'm curious, what do personal win/loss records provide statistical insight into? You have to factor in matchmaking, and I guess assume that the goal of the matchmaking system is to put you into groups of similar skill to try and keep the odds of winning for either team around 50%. Taking my numbers as an example, I'm 950-922 in normals, have only played 3 ranked games in well over a year, and am like 1112-1117 in aram.
Is there anything that can be extrapolated from personal win/loss records?