I need another Rotary. I had one but had to sell it when I moved into my new house. 3 minutes isnt to bad. the reviews on autogeek made it sound like it was forever.
Any polish will have a shorter work time in comparison to Optimum. But most still have an adequate work time when used via a random orbital. It's when you take a PC-designed polish and run it with a rotary that you'll get problems.
The old 3M PI-III stuff had a nice short work time IMO. Perhaps I'm just used to it, but it always seemed just right to me whether working by hand, PC/Cyclo, or rotary.