I've noticed that my guys with most experience tend to make bigger plays at the end of playoff games in particular, but also I had the fun experience of seeing my PG with Proficient FT, but Pitiful Experience, go 0-4 from the FT line in a League Finals game that inevitably went to OT where I lost.
It seems like the Experience factor is cranked up a couple notches in the Playoffs, especially the Finals.