I think signal quality is huge from what I can tell. I had a 100% charge when I went to bed last night, and at like 4am it was down to 60%. My phone is in the basement, and the screen was never turned on once.
I have it at 72% now, and it's 10:50pm. In the basement again and i'll see what it is when I get up around 7am and report back.
The other thing I see with my battery % is that it drops about 3% at a time here and there. I had it at 100% like 3hrs ago, made a 5min phone call and about 5 texts, and now I am at the 72% I listed above. No BT, or Wifi either.
It may be my last report on the phone too if I end up going with the Samsung Epic. I had to switch to the family share plan and ditch my SERO so now I have that option of going with another phone. Even if I had waited till October, it is still cheaper for me to get the two of us the family plan then my 23% work discount over me with just a SERO and her with the $70 plan. So my TP2 may be a RIP phone tomorrow. Hopefully if it is, I can give it to a good home