No freaking way. I take my TB off the charget at 7am. By noon it's at 40%, and that's just doing a few texts and email checks. My D1 would be 70% at 5pm.
This thing devours the battery while it sleeps.
On 3G? that's crazy talk. I just went 7AM to 7PM on 3G, surfing forums perodically, making calls, and smsing, and was at 60% when I left the office.
Sure, on 4G i'd be much lower after that, but 3G is pretty smooth.