I'm guessing you're referring just to iPhone sync, cos I've just tested Wifi syncing to an Android phone and it was smoother than I've ever had Windows>Android! And then it wasn't. And then it was. Ok, when it works it's beautifully smooth.
Connecting by USB actually isn't working - only Wifi (multiple tests). Some glitches. On the first sync everything went well. The second sync refused to sync a new playlist (it just resynced the same material as in the first sync). And then it couldn't find the server. I deleted the phone from the Devices list in MMM and on next launch the wireless connection worked again and is syncing.
