I am torn as well...I have an original unlimited iPad plan and live in Oakton and work at the county government center in Fairfax. So far in my home and most places around Fairfax, Chantilly, Oakton, Verizon is pulling 6-12 down and 1-6 up and overall AT&T is doing about 1-3 down and usually less than 1 down...in short, Verizon is kicking butt in almost all scenarios. The only time I saw blazing speeds from AT&T is in Arlington near Ballston and a few times inside the government center, but almost everywhere else, Verizon was strongest.
So AT&T slower speeds but unlimited for $30 with no probable hot spotting for unlimited plans vs. in general faster and more pervasive coverage of Verizon with hot spotting and 2GB for $30 a month.
And yes, I purchased one of each but will have to return one by next week....a few times my original iPad on AT&T 3G turned in faster times than the 4G iPad....go explain that. What would you do?