CX Query

This one’s for all of you CX fans out there.

The pic below is of Tim Johnson (USA) during the 2011 Cyclocross World Championship.

Midway down a muddy, slickery descent about halfway through one of the laps (EXIF shows 15 minutes into the race, so likely third lap).

So here’s the question –

In a race where the rider is going to swap his bike out several times, why in the world would one have a Garmin Edge 500 mounted?

Is he running a power meter on each of the bikes and then merging the data after the race?

If so, in the grand scheme of things, for the WC, why would you worry about power?  At that point, you should be properly tapered and peaked, unlikely to come close to that wattage level anytime soon.

So why bother?

Just curious.