When he put on full throttle the front end dived quit a bit due to the soft front suspension causing the rear to unload.
The result was that the rear wheel spun slightly. As the tire heated up the spin was reduced - this explains the increase in power from 1st to 5th run.
I know the guy who did the Dyno test. It was just for fun and didn't cost me anything.
As I get more miles on the bike (maybe at 50k), I'll give it another go. At that point I expect it to put down more power.