OK -
So I have Garmin Edge 500, Garmin 910, and Garmin Vector.
Did a ride this last Saturday that I thought was pretty hard. Uploaded my data from my 910xt and it didn't seem to be registering what I felt the ride was.
The activity can be seen here:
http://connect.garmin.com/activity/453397662
Then uploaded the data from my 500. The data was all the same, except for the power data. This seemed like it was more in line with what I felt the ride was like.
The activity can be found here:
http://connect.garmin.com/activity/454821045
Anyone have any ideas as to why this might be happening?