For example, AA's current website is "effective" in the same way it is effective to travel 50 miles from here by walking. But what if you gave me a bike? What about a car?
AA is in the business of giving their customers an enjoyable experience. They just happen to transport them via airplane as their business. Or at least that's how a customer experience designer should look at it, I think.
And stuff like this is just totally unacceptable: http://dustincurtis.com/screenshots/Photoshop-20090522-08344... .