I just had my first U2 GA experience in Milwaukee last Sunday, and didn't get in. I was on the rail outside the walkway, and was surprised at how awesome my spot was even though I wasn't one of the cool kids in the ellipse. :)
Anyway, I don't remember it being discussed much here lately, so I was curious since I was talking about it a little with the guy I ended up standing next to (who was great - U2 fans [for the most part] rock so much!). It may have been extensively talked about at the beginning of the first leg, but I wasn't paying much attention since I was so depressed about not getting tickets at all at that point - luckily it all worked out later, yays. I apologize if it's been beaten to death!