I think that anyone in a fringe reception area, that might bang on a particular model's weakness to hold a signal under those conditions, may easily find they've got a battery eater on their hands.
Without full info on what the radios were doing, I'm unable to determine if this sort of report is a model issue or a mismatch for that user's reception environment. I strongly suspect the latter, but that's nothing more than what seems to me to be a reasonable guess without all the facts.
So many factors.
PS - Why be surprised at the Rezound? I reported my battery life on my newer 2 core HTC.