Some times when things have been so good for so long, people just assume they are still good. The reputation is enough to convince people that a product is still good. It's like Vince Vaughn. The guy made a couple of great movies and now we just assume everything he puts out is going to be good. Not so much!
The Dallas Cowboys Cheerleaders defy that stereotype. We just assume they are going to be smoking hot because they have always been smoking hot. While that could be a dangerous assumption in other areas, the Cowboys cheerleaders ALWAYS deliver. There is basically no drop off from year to year.