AF, LH, Frontier, United, USAirways, IB, British, AmericaWest, and lots of other airlines that used/use BOTH the 737 and the 320 and PROVE that the 737 has these unique, discriminating, qualifying performance differencials.
Non of these airlines operate like easyJet! They have COMPLETLY different route structures, passenger-type, frequencies and turn around times! Just because an aircraft is in the air 12+ hours a day doesn't mean it'll suit easyJet.
As a matter of fact, ALL these aforementioned airlines, having tried the 737 for years, went for the 320 for fleet renewal, and many of them have placed repeat orders for the 320s. The 320 is flying for more than 10 years now, and we all know what their operators have to say about it.
Yeah, you're right, BUT, once again these airlines have key differencies with easyJet. AF, LH, Frontier, United, USAirways, IB, BA all use their A32X on a lot longer flights and utilise them a lot less than easyJet would. They would fly quite a lot more sectors with quicker turn around times than they are doing with these airlines.
Your bone's got a little machine