I owned both an FJR and an R1, and believe me, getting into trouble with throttle is JUST AS EASY on an FJR as it is on an R1.
As for doing a backflip with the throttle alone... pure and undiluted hogwash. If you hold the 'go' handle wide open and don't let go, you will soon contact the taillight to the ground, but no backflip, not even if you weigh 55 pounds. If the writer did REALLY have a backflip occur, he would've had to have held the clutch in, revved it up, and dumped the clutch, with no wheelspin.
I read r1-forum.com daily... and one has to be a bit skeptical about many of the comments there. Many of the posters are 14-year olds, pretending to have a bike... though it seems to have become a little more 'grown-up,' lately.