IIRC, it's not just the wake up, I think there was also something about less clothes making the whole heat transfer from you to the bag back to you a lot more efficient than what goes on with wearing everything you own.
just a heads up, the Touch is absolutely horrendous to use in crowded places.
Yeah, I can imagine. It's just a 30 minute commute twice a day, so I could generally just set it up before I stuff myself in at a bad hour, if it came to that. Still, necessary so I'm not totally berserk when I get to the office.
Happily, when I got home and did a factory reset with itunes, it seems to have sorted the issues for now. Let's hope this lasts for a couple of months more...