"R up a bit", exactly what does that mean?
You mean that when it is cold and you first put it in drive that it seems to take more rpm's to get moving?
Possibly low on fluid, noticed any leaks? There have been a few who have had one leaking.
I would take it back to the dealer and get it checked out no matter what so that there is documentation of possible problem so that if the transmission goes out later on you will have already made them aware of the issue.