i got my evo on boost however the person that hacked this for me apparently didn't do something to get me to 3g speeds, on a speedtest i receive constant 17KiloBytes / sec D and 25KiloByte / sec U.
Meaning I am not getting even 3g speeds, thoe I may fix this issue soon, I can assure you 4g wont be on boost for now.
My tp2 had way faster internet but the evo is so great I enjoy using it even with slower internet