The "Troy isn't good" thing goes back to the 90's. There was also a lot of "Emmitt is a product of his line and he has nothing on Sanders or Thomas" that I got thrown in my face until Super Bowl XXVII, and a few holdouts till XXVIII.
I was always amused by how much I was ragged on for being a Cowboys fan in the early 90's by those that kept on about how the Cowboys hadn't won anything in forever, and we lost 3 Championships in a row, and we'd keep doing the same thing over and over, choking. I was in High School, out f Dallas for just a few years and even my Science teacher at the time kept telling me "You all will do ok in the regular season but you can't get past 'Washington' or the Eagles, you all won't get out of the playoffs".
A few years later the same people that were hammering me about Troy sucking and Emmitt being average were wearing Cowboys jerseys and saying they knew all along.