I'm not sure that I fully understand your queston, but here goes:
1) The sim engine runs it's stats as if the games it's simming were playing full 15 minute quarters...this cannot be changed...
2) If you want your stats to mirror that, you have to play enough minutes to average around 120 plays per game...I get to that number with 12 minute quarters (15 second Accelerated clock runoff)...some use the ful 15 minutes or closer to it...
3) If you super sim games (instead of the regular method, the quarter length seems to be in the 8-9 range to get 120 or so plays per game...
Bottom line:
The CPU / AI will ALWAYS sim at around 120 plays per game, so to mirror that you'll need to play longer games or super sim (and run a test to get a more exact quarter length to get those 120 plays)...
Hope this helps...
And yeah, TAP the square for the QB slide...