With the limitation of an absolutely minimal understanding of WiMAX, I've been trying figure that out myself. One of the basic questions I'm trying to answer is whether the network and equipment Rogers is using follows the base 802.16-2004 standard or the 802.16e-2005 addition. In other threads, folks have pointed out that Rogers states on a web page that their subscriber units cannot switch towers without a cold restart, so 802.16-2004 seems likely. I haven't found confirmation of that though.

On the other hand, it appears that Rogers is using Motorola subscriber units, and Motorola indicates in their product literature that transparent hand-off between base stations is supported even at "vehicular speed". Does that mean the subscriber units are 802.16e-2005, but Rogers has done something in their network configuration to break the roaming capability? And if Rogers calls their network "pre-WiMAX", are they really using Expedience and planning a later transition to WiMAX?

I'm going to keep digging as I have time.