I think cadence is very much an individual thing. Greg Lemond tended to ride a cadence in the low 80s. When he was active, people tended to emulate him. But Eddy Merckx averaged a cadence of something like 115 when he shattered the 30 mph avg record for the hour time trial. I am not going to say that Lemond and Merckx did not know what they were doing. It would be like saying that if they rode the "right" cadence, who knows what they could have accomplished?

I ride at over 100 rpm because it just "feels right". I would suggest try a number of cadence levels and see what you settle into.