Have you tried anything with modifying your climbing technique? More slack geometry requires some intentionality ( is that a word?) in regards to chest down, scootching forward on the saddle some. How much travel in the fork? A longer travel fork combined with geometry with affect this too.

What were you on before? It can take some time and just messing around with how you ride to get the hang of a new bike.

There were some other threads on this section a couple of weeks ago where the whole kops thing vs tops tube length was discussed
http://forums.teamestrogen.com/showthread.php?t=31988

I'd ride it for a couple a weeks before I go changing out the stem.