^Was John even involved with Dragon Khan? But I agree with you, not only Dragon Khan but other B&M coasters of it's size. To me they're the perfect length to get enough out of a coaster, however leaving you stable and wanting more rather than walking off and heading straight to the toilet.
But yeah, thats the blueprint for me. It's personally all to do with height and mass ; the taller a rollercoaster, the longer I expect the ride (unless it's a launh/dive machine), so there is no definate perfect length, only alternating dependant on the rollercoaster I suppose... :?
P.S. I've never queued any longer than 1 hour for Dragon Khan, and that was on a busy day with a full queue, I've seen the signs say 1h 15' however. The capacity is a work of wonder. B&M's :happyhippy: