Here is what I did, I have the same issue and beef;
- search around this site for "sync my itunes', a utility that you need to run. it will add "UNKNOWN" to the album, genre and anything else, tags. This will help sync run faster.
- run this, sync the iTouch with iTunes again.
- plug into the truck, set the truck on accessory, lock the doors, and walk away for 2-3 hours!
When you come back, it will be synced.
Bummer huh?