Hey you can't .... do that!

I don't think its fair enough to say "most" areas.
You can't say you've been to "most" of the United States and tested AT&T vs Verizon, can you?
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It depends where you are. If you've ever been to NYC before, its pretty clear Verizon dominates the market over there.
Where I live, AT&T is dominant here. Verizon's coverage is about the same, but they are slower. My friend's Droid X gets 1-1.5MB download while on AT&T I get close to 3MB downloads. Also, at a party - I got pushed into a pool and my phone got destroyed and had to use my friend's Verizon phone. The service was pretty bad. It was hard to hear and the calls hardly went through.
It depends on your area!