update: I played with this on the way in to work. I'm seeing either 9 seconds or 12 seconds. 9 seconds comes when I bounce back & forth repeatedly between two channels. If I go away from the XM plugin, and let CF sit idle for "a while" (at least an hour on my system) then come back into XM, the first channel switch will be 12 seconds. The additional 3 seconds is more than likely from something being swapped in, either via Windows or CF itself.