This sounds like bullshyt. I have been messing with a iphone 5 since yesterday testing that LTE and and apps and sh!t kinda heavy use and the battery def did not drain that fast and it wasn't even fully charged.
It got to about 9% before I set to charge for the night. I keep testing it and posting if anything changes.
Edit:
This shyt is more annoying I can upload pics and shyt from chrome/stock ICS browser on Andoid. Not with Safari I guess.
The stats on the phone I'm using right now.
On Another not the phone is nice but it feels slightly cheaper than the 4s. I That glass casing gave it a premium feel. Now not so much imo.