In regards to ATX4Gs comments about 58Mbsp. About 2 months ago I was at an AT&T store checking out their 4G speeds. They got about 15Mbps down at the store. He said when they were right next to a tower in Bee Caves they got 45 Mbsp down.
I have been a lifetime Sprint customer and hope to get similar results on my EVO 4G LTE phone. On my old EVO 4G I got 10Mbsp on WiMax in the Arboretum so I am optimistic about LTE.
Those speed tests also vary a lot depending on the server you use. I have had best results, many times better, using servers in Dallas and not Austin where I live.