said by prewimax :

Are you guys talking about the new mobile WiMAX or the pre-WiMAX. The pre-WiMAX doesn't perform as well and only Portland, OR has mobile WiMAX (from Clearwire).

said by xenophon :

Not really appropriate to post pre-WiMAX results in this thread, which is about 'mobile' WiMAX. Word is, mobile WiMAX can average 2-4Mbps and there are reports of 6Mbps or more. Technically, devices are spec'd to go to 15Mbps but the backhaul probably won't be there to do it.

Latency is typically 50-60ms but can be much much lower if very near the tower with LOS, as low as 10ms has been demonstrated. Will obviously be higher with lots of obstructions and more distance.