I ported one out last year, I had to make it portable from inside my Google Voice account (a quite poorly documented pain, actually), but that's still a much higher bar than your average cell carrier.
I don't remember what the second one was, but it ended with the support person agreeing it was a problem, but suggesting I post to product forum.
If that's amazing support, I'd rather rely on the normal channels: writing an angry blog post and posting it to HN, or suckering your smart friends into interviewing at Google and bribing them to fix your problems once they get there.