Had a chance to shoot with it this afternoon.  I wasn't going for technical brilliance, artistic, or awe inspiring.  I just wanted to capture a few moments for my wife because she couldn't make our daughter's preschool holiday party.  This is one I came away with. 

Everyone has been right... the 17-55 is pretty darn sharp!  I feel like perhaps the subject isolation is what's been missing from my 15-85 as I've used that lens in this very same room to take pictures I'm very happy with, but they didn't impress.