He probably can tell you how good a guy is from still pictures and how he lollypops his throws.
I've watched 677 regular season Cowboy games and 55 playoff games that include 8 Super Bowls and 13 Conference championship games.
I've seen Cowboy quarterbacks that were 1st round picks like Craig Morton and Troy Aikman, guys that would have been 1st round picks like Roger Staubach, really good quarterbacks like Danny White and Tony Romo, unlikely heroes like Clint Longley, very capable former starters like Bernie Kosar, Steve Beuerlein that contributed, disappointments like Quincy Carter and Gary Hogeboom, all the way down to guys that never should have been there like Babe Laufenburg, Clint Stoerner, Steve Pelluer, and Kevin Sweeney.
You tend to get a feel for some of the things that are happening, not in a professional sense, just certain nuances. However, I ceretainly don't rely on that for my opinions.
I use some very reputable sources to get information, NFL Reference, Football Outsiders collect some very unique stats that are far more informative when it comes to what is really happening on the field. I told you, I am obsessive.
I know that the typical fan remembers perhaps three or four important plays of a game one month later, unless it is a playoff game or at least must win. And typical fans base their entire perception of what happened around those plays.
I never talk out of my ass, I do my homework. You can disagree in whatever style you wish, but give me that. I do my homework.