The people who get crap battery life out of the phone aren't using the phone correctly. It really is that simple. There are a few faulty batteries out there I'm sure, but 99.9% of the time the battery is bad because the user is doing something wrong, or they've downloaded a crappy app that is eating the battery life. There's nothing tenuous about anyone's claims to getting a long life out of a charge.
With anything but extreme use, a well configured Desire will invariably last the day. Most of the time I finish the day with about 50-60% remaining, despite an hour or so of browsing the internet/downloading apps, maybe a half an hour phone call, and a hundred or so texts, plus about 30 minutes of browsing RSS news feeds in the evening and maybe half an hour to an hour of playing games on it to while away dull commutes.
Thanks for answering my Qs, I was just intrigued. Sync'ing two google accounts is probably quite a bit of drain, the problem is I need to have both with accounts up to date to at least 15 minutes so manual sync isn't going to cut it. Im testing Juice Defender to see if I can turn the data on for only 1 minute in 15. Perhaps that will help stretch the battery out