As an America West Airbus pilot, and also having flown Boeing & Douglas planes, I think I can reliably speak up on this.
The oldest of AWA's Airbus planes are going away; they're being replaced as new ones arrive. The planes all have IAE engines, but the old ones are -A1 powered. The newer ones are all -A5 powered and have much better performance, especially on hot days in Phoenix. As much as I appreciate the high technology in the Airbus (and find it enjoyable to fly) I think that they have chronic maintenance problems sooner than Boeing or Douglas planes have. You can easily tell the age of the plane just by looking at the panel and the maintenance logbook. New, they're both clean. Old, they're both cracked with patches and MEL stickers on them. I think it's a shame, but it seems to me that the Airbus does have some problems lasting as long as other planes. Do they still fly? Yes. Do they do so reliably? Yes, for the most part. Are they cheaper to buy than Boeings? (a-ha!). Yes.
This absolutely isn't designed to be a Boeing vs. Airbus vs. Douglas thread. I've flown them all, and enjoyed them all. The Douglas was stone simple, overbuilt, and will probably last until I'm well into retirement. The Airbus is a great example of high technology - an engineers plane, built as inexpensively as possible (good for the airlines). The Boeing is somewhere in-between; well engineered with the pilots first in mind, but sturdy enough to take a lot of abuse. They're all good. They're all different.
HAL