Having flown in and our of PMI for 3 years, I have always been astounded by that airport. Furthermore, it is diametrically opposed to everything that airbus claims when it wants to build its super jumbo.
The company that I was working for was sending 3 or 4 or more 320s a day between Man and PMI at some points. They wanted to go even higher but couldn't because of slot restrictions or so said the chief at the time.
If for marketing reasons they couldn't guage that up to a larger aircraft, why would any airline do it? Seams to me that they could have sent 2 330s instead of 4 320s.
Also seams to prove the case against the 380. People want to go NOW. Not when the larger airplane gets full. And these are just the budget holiday people, not the business men where time is money who really pay for the major airlines.
Cheers
Wino