Might also be the tower you're using when in your area.
I am on 4G with the Droid Bionic, and at my house, with 2-3 bars of 4G Service I only get around 450kbps download, but around 9000 kbps upload.
Once I drive ~7 minutes into town, my download goes up to around 21000kbps download and 16000kbps upload, also with 2-3 bars of 4G Service.
My conclusion is that the tower Im connected to at my house sucks, I've been meaning to call Tech Support but havent had the chance yet.
Might be the same problem in your area that the tower you're hitting is just slow.