Fastest 3G Network?

Verizon sure is wailing on AT&T these days, and AT&T's rebuttal ads featuring Luke Wilson aren't a very convincing response.

Anyway, isn't T-Mobile's 3G network the fastest? I thought they were the first and only 7.2Mbps HSPA rollout. Did AT&T match that? If so, is being tied for fastest still "the fastest?"