There are sporatic areas in the DFW area as they are upgrading and testing the towers.
3 weeks ago in Garland, i picked up LTE on my Note 2 for a few miles on Centerville Rd. The following 2 weekends i was in the same area and its back to normal HSDPA+..
I live near down town Dallas and work in North East Dallas, and my Note 2 has yet to pick up LTE in those areas.
But i have on a few occassions gotten about 20 down on the normal network and am pretty constantly getting 10-15 down with 1-2 up. Coming from Sprint this is awesome..
With speeds this good i can live with out LTE. ha ha ha..
Id agree with the other users that it looks like you got HSDPA+ and not LTE..
The big difference with LTE is uploads tend to be closer to download speeds, where as HSPDA+ tend to have great DL and slow UL..