You know, I think that this list will be updated again in 10 years. Of course everything on it is older because they are viewed as classics. Classics will always generate more applause than something newer and less tradtional. For example, of the Lord of the Rings trilogy, I would say that The Return of the King and The Two Towers were both far superior to the first one, The Fellowship of the Ring. Of course, the first one introduced the concepts and conflicts that the other two films resolve, and if I had to suggest one of the three, I would suggest Return of the King.
The fact that Midnight Cowboy is on the list indicates to me that it's not because people were opposed to the ideas present in Brokeback Mountain, only that it has not yet reached a classic mentality in most of the people that have seen it. I'm sorry, folks, but as a society, we're still digesting. The majority of people realize it was a very important film; we're just not certain what shelf to put it on yet. That's okay. Over time, people will realize the grand artistic measures of this film (some people saw it immediately, even some very important people) and the list will be redrawn.