I haven't observed this in the 370z, but I do know for a fact that in the G37's 7AT, the shift points change after hard driving (foot deep in the pedal, hard braking). The car would downshift much earlier and upshift later. The change is even more noticeable in the sport mode of the transmission, which our 370Z automatics don't have. There, it will always downshift to keep revs above 3 or 4k. It's been a while, so I can't remember the actual cutoff. If I wasn't already driving it hard, then the auto wouldn't do that.
I haven't seen anything as drastic on the 370Z, since I keep it in manual mode in all but the most boring of drives. But if there was any learning, I doubt it'd be anything other than changing the shift points.
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