I think I am correct in saying that a B737-800 can park on any stand that an Airbus 320 variant can,(Also the XL -800 is often parked on the western apron so I reckon the Ryans -800 will fit as well) so I think that one reason for some of "easys" longer turnarounds is waiting for busses, ambulift etc (waited 25 mins for the ambulift to pitch up the other day!!), so any airline allocated stands 1-5 stands at least a fighting chance of meeting their schedule Hmmm.
Cheers Silvertop