I'll play...

classification: rookie (not counting ancient history, 3 months biking)

Flat solo for one hour, ~17 mph (up from ~13)
Fast group ride, ~22 (anything faster and they drop me)
Cadence solo: 85-90
Cadence group: not measured, but a bit lower as its easier to push a higher gear and I end up coasting some to not cause peloton disaster
48/36/26
9-speed 11-34
Age 54

As mentioned above, I think fitness, biking goals and experience have more to do with this than age. I've seen my average cadence climb steadily over
the past three months.