Cadence is pretty specific. Eddie Merckx ran a bit over 110 when he broke the 30 mile barrier for an hour ride. Greg Lemond generally rode in the high seventies or low eighties. Lance Armstrong was usually over 100.
Now who am I to say that Lemond was OK but he would have been good if he learned how to ride his bike? I figure all of the above guys were probably very close to maximizing their biological potential as cyclists.
When I started out cycling, anything above 80 felt fast. But as I got experience, I increased my cadence. I would suggest that you work on increasing your cadence especially on slower rides. When you get able to spin at high speeds, you may find it feels good and works well or you may find that it just feels better to push bigger gears.