Got the phone this morning at 10-ish, it had about 75% charge leaving the store. Got it home, put it on the charger, ran the update for ICS (but otherwise did not power off for charging), took it off the charger at 100% indicated. Now at a little over 4 hours in, I'm at about 70%, with moderate usage (hey, new toy, gotta play!). Obviously this isn't tapping the phone's full potential, but even if it never got any better than this, it's still a lot better than I was experiencing with the Thunderbolt it replaced, as that phone would be in the yellow after about 5 hours, even with light usage.
Another thought . . . I like the layout of the HTC a little bit better, but that may simply be because it's all I used for over a year. I do know, however, that the keyboard on the Razr is much nicer than the one on the HTC, and that was one of the things I definitely missed when I went from my OG Droid to the Thunderbolt!