Yeah, the battery definitely seems pretty solid. I got mine yesterday and played around with it for about an hour or so last night, and maybe another half hour this morning, and I was surprised to see I still had 90% of the battery left. On my Transformer Prime, I'd probably be sitting in the 80s, or even 70s, by now. @_@
I'm also impressed with how quickly this thing actually boots up and connects to my wi-fi. I haven't actually timed either one, but it seems like my phone takes about 30--ish second to boot up, then maybe another 10 seconds or so to connect to my wi-fi, then another 30 or so seconds before I start getting my e-mail notifications from overnight. With the new Nexus 7, it seems like it only took about 10-15 seconds to boot up, and within seconds, I was connected to wi-fi and getting notifications of the e-mails I had gotten overnight. Pretty good stuff. I wonder if that's Android 4.3 at work, or if that has something to do with my phone (and/ or the ROM it's running). Hm.