A very interesting article.

I have to agree with the comments from United about the desirability of the extra space in the Airbus A320 series. I took a short hop (LHR-DUB) on Aer Lingus this weekend, out in an A321 and back on a B737-400. It may be an illusion but the Airbus feels much bigger and I am certain that the seats were wider than the Boeing. Even on a short flight that extra inch or two can make a lot of difference to your mood and I felt a lot more comfortable in the A321.

Thanks for pointing us in the direction of the piece.