Professor neither your avatar nor the pic you posted show on my system. What speed is the GPS showing?The number of active birds you are locked in will greatly reduce false numbersTwo times I had false "max speed" readings. When I was doing about 40 MPH the Garmin "blipped" for a second or two and indicated I was doing 120 MPH. Another time it said I had been doing 166 MPH. Other than those two times it has been quite accurate.
Along those lines, here ya go!
Nope, not photoshopped.... and I'd say pretty accurate!