My god, you have so many things to do in order to get the a/c ready during your turnaround that you would need at least 1 hour to do it !! 25 minutes is not enough for you isnt it ?
Nuageblanc, perhaps you noticed that Zbman picked CIA as an example of somewhere he thought 25 minutes is unrealisitic. That might suggest to you in one of your more lucid moments that certain airports bring certain difficulties.
25 min turnaround is hard for a 319, but hard for cabin crew !!!... not for pilots
As I'm sure you're aware, not everything depends on pilot performance. On turnarounds it's rarely if ever a limiting factor.
So you mention cabin crew, well you can't take off if they're not ready, neither can you land. By the same token, even if the fms is programmed to fly you where you're going upside down, if they're not ready, neither can you board passengers. Besides, cabin crew are also rarely if ever the source of delays. If anybody has a problem, be it the cabin crew, the fueller, the ramp staff, the dispatcher, the loaders, the disabled passenger, the people in ops, the ATC, the guy trying to push back behind you or even god forbid, the pilots - then that will eat into your turnaround time.