Some people will defend anything on GAF. Halo Reach framerate running in the teens when zoomed in on many maps? Some people have said they don't notice it and that complainers are being picky. Reach's framerate is smooth as butter according to them. The worst ones are the people that notice it and say that it doesn't matter. Oh, and don't get me started on the people that defend matchmaking because game browsers are too difficult to comprehend and/or use.
I played the game more than anyone on GAF and framerate drops were very, very few in my particular experience (however, I did personally observe a perspective or scenario that can produce a framerate drop on just about any map, even the Anniversary ones). In my opinion, the complaints about it seem to be out of proportion to real instances of the problem, but fixes should be made where feasible (like implementing an alternate version of Asylum/Sanctuary). I don't think I've heard anyone say Reach's framerate was perfect, however I've heard a lot of bombast about how it sucks, which is unfair.
I'd love to get you started on why game browsers would be better for Halo, because I think that is a ludicrous idea. Matchmaking does more than just find games, it provides automatic skill matching and standards for game settings. It takes large numbers of people that want to play the same thing and vigorously and quickly sorts them into matches. People complain about TrueSkill being too loose and guests and the like all the time, and you want to just throw it out the window alogether? People complain about the lists being split between TU/Vanilla and now you want to multiply that problem times 10,000?
Everyone interested in discussing FOV should watch
part 1 and
part 2 of the lecture to which Computron linked.
Reach uses a 78 degree FOV.