I can confirm that the sim qtr length unfortunately has nothing to do with the effect on the score/stats. It's too bad. Even in game partial simming gets messed up. For ex., if you play a half and get some good stats, you can't quit and end with a realistic score and/or stats most any time.
After puja publishes his roster, I'm going to take a strong look at capa's nos. again, combined with my own, and try to get the best damn in-game experience possible.