AT&T is the scum of the Telecom world (along with Comcast), but they do have SOME LTE, but it seems as though you need to be able to throw a rock and hit the tower to get it. Their HSPA+ is an abomination they like to call 4G that no where else in the world does...
Where I live (Va Beach/Norfolk), it's Verizon's towers that you need to hit with a rock to see if it's got LTE or not.
Verizon's been selling LTE here since last October.
AT&T has no LTE here -- just HSPA+.
Thing is, it seems like literally every AT&T tower here has HSPA+, whereas it seems like only a few Verizon towers have LTE.
What this means to me is that it's not uncommon to end up in an area where Verizon LTE has 1-2 bars of coverage, which equates to some really piss poor LTE speeds.
In this area, AT&T's HSPA+ network offers more
consistently faster download speeds than Verizon's LTE does.
Don't get me wrong, though. If you're near a Verizon tower with LTE, nothing beats the experience. It's just that there's currently too few LTE towers to deliver the kind of experience here that I think most people expect from Verizon.