As I mentioned in my TLA post, AT&T just lit up their LTE ("Long Term Evolution") network in the Memphis metropolitan area.
All the carriers call their LTE network "4G" but it really isn't 4G. Nevertheless it's FAST, for now. Time will tell how the various carriers' LTE networks stand up to the the onslaught of millions of iPhone 5s in the next couple of weeks.
What I can tell you is right now it's smokin'!
Here's a screenshot from speedtest.net on my Skyrocket near my house.
Yeah. You're reading that right. That's showing more than 25Mbps down and almost 7Mbps up. It just can't stay that fast. Think of the backhaul capacity the carriers would have to have. They'd have to have fiber to each tower.
But I'll enjoy it while it lasts.