It's just very hard to get a benchmark on difficulty when you have nothing to go on; i don't even understand the reference in the thread title. The best yardstick is age and gender...

I accepted your invite nevertheless and gave it a go, my remaining times were- 48, 48, 48, 48, 48, 48, 48, 48, 47, 47. I'm disappointed about the tailing off at the end, and i wouldn't be able to do it all morning as my tennis elbow was flaring up by number 7.