The rep in the Cingular store told me that there are various classes of EDGE much like there are for GPRS. He told me that not all EDGE areas provide the same speed (even though they are all advertised as such) and that not all EDGE devices can get the max speed. He said the Treo 650 is and EDGE 10 device.

Can an engineer type or someone in the know shed some light on this?