My iPod Touch takes a REALLY long time to sync. By long time I mean >6 HOURS! Most of that time is spent with the "backing up iPod" message and a very slow progress bar. Because of that I've turned off the sync on connect option and only do so when I have the time.
I also have an iPhone. It seems to sync in a perfectly reasonable time where I define reasonable as "less time than it takes to bring the charge up to full." I haven't actually timed it, though.
Snow Leopard 10.6.1, iTunes 9.0, Gen 1 Touch (MA623LL) 8 GB w/ 350 MB free, OS v3.1.1
