The newly redesigned SpeedTest Beta works on LTE with accurate upload: Android Speedtest.net Mobile Beta | Team Ookla
They say "Location awareness and server selection is much improved, we now show real-time graphs of throughput during the tests, and the bug introduced with measuring over LTE on the HTC Thunderbolt is fixed. Anyone with a Thunderbolt will definitely want to use this build instead of the one in the Market."
Edit: New GUI is nice and seems to work well on my Thunderbolt.
They say "Location awareness and server selection is much improved, we now show real-time graphs of throughput during the tests, and the bug introduced with measuring over LTE on the HTC Thunderbolt is fixed. Anyone with a Thunderbolt will definitely want to use this build instead of the one in the Market."
Edit: New GUI is nice and seems to work well on my Thunderbolt.