I've only had my '13 Sport for 6 days. It came with 16" wheels. Yesterday I removed them (P225's) and put on 17" wheels from a Sport S, wearing Wrangler GS/A's. (My wife hated the basic wheel/tire setup and preferred the Sport S version).
Anyway, it seems to me that the 16's rode much smoother, and the 17's have a bit more bounce and sway. Almost all my driving is on secondary and gravel roads. Not much highway driving up here.
So, is it my imagination or have others noticed the same thing??