Check with local Verizon users to assess their experience. Here in the San Francisco Bay Area, ATT's network has been hit hard by the popularity of the latest iPhone 3Gs. I was on ATT and gave my daughter a 3Gs but we found it a little laggy. So, I recently switched to Verizon with a Storm 2 and have better signal, coverage and data response. As others have said, this reversal of fortune between the two carriers is probably temporary and over the course of a year may switch again. The popularity of the Droid on Verizon might start may change things for them, too.