I can also confirm I am also having similar experiences as you. Also bought from amazon (received 12-08). My initial impression was that its a lot smaller than what I had expected. No reboots, mics, or any call issues.

Since i'm also in the bay area (san jose), i noticed it went in 3.5G a lot of time (i think it may be due to the supposely upgraded cell towers to support of HSPA 7.2mbps?). I only wish there were more apps available.

I also noticed that amazon completely took down their order page. Its only showing 3rd party sellers. I guess its busy trying to fulfill all their orders and cant take any new ones.