For what it's worth, I actually shoot my SR9c better than my full size SR9. Whether that's some quirk of my particular two examples (or me) I don't know......
I do not shoot IDPA, but have been shooting in PCCA which started here at a local range and took the SR9c for a spin at one match. Didn't do too bad with it.
NC Hunter's Education Instructor
Member (What's PCCA you ask? <- Check the link)