Agreed. I think dunbar has a pretty good short-term anaerobic capacity (I think that's what Coggan is getting at with FRC in the next release of WKO+) and a relatively weaker aerobic capacity.

The test was also done on a pretty fair grade (11.2mph average speed) so he might have been more in the "climbing threshold" kind of range that some trainers reference -- low cadence above-threshold efforts that can be sustained for a fair bit.