True, they would have to have undergone some pretty substantial GPS data manipulation though.
This gave me an idea.
Could we use someone else's garmin files to build a "best case" for JM's power output? Say Reno's? Export everything into excel, we know the average speed that would be needed, so figure out what theoretical power would be required to meet that. I think there are enough knowns to calculate the unknowns...
I don't have a power meter, haven't trained with one, but my math mind says you should be able to build to virtual file from JM for the first 40km and last 80km. Maybe this would show a "not normal" performance. The more power files one had for the course the stronger this case could be made.
Just to clarify, I'm not trying to convince myself... Given the context (multiple DQ's for course cutting, eye witness testimony, photos), I think its reasonable to assume she only completed 2 laps of the bike course.