Interesting point. I looked back at the last few games TNK posted and TOP is usually 20 : 40 in favor of TNK. I think the reason for this is the CPU is unable to sustain long drives because they can't run the ball. Often the AVG cpu running play is only 3.0 yards or less. The game against Houston and Arian foster is the exception, although I would venture a guess that most of his yards came on 2-3 long runs and the rest were short gains which would explain the TOP.
I find that the CPU can't run the ball very well on slow game speed and that you have to put it on normal to get a decent CPU rushing attack so they can sustain drives and equal TOP.
Not knocking your sliders TNK, I used yours quite a bit, just saying that's what I've found.