You can definitely see the influence Adam is starting to have on Kristin. She started the final segment of EEAD by saying "Hey, hey, hey!" I don't think she ever would've done that before.
Adam and Kristin seem to have an entirely different rapport on PME, but I think that's because PME doesn't have the :24 and :54 segments with both of them together at the desk, which is when their conversation/silliness time usually takes place.