ok, any FTP over 300 and you should be racing. 547 puts you looking over your shoulder at pro tour riders going up Alpe D'huez. Seriously.

I have no comments on whether those values are skewed for clydes because I don't have a trainer and I cry about my noodle legs every time I go for a ride with a real, calibrated power meter on my bike.

Keep at it though - even if it's wrong, if it's consistently wrong you can still use it to train.