I dunno mate. I think it's fairly mainstream now. My 13 year old suburban all american nephew and all his friends are addicted to FIFA. They spend all day checking youtube clips and fighting over the greatness of Messi or Ronaldo. They get excited about the big 4 sports when the play off's roll around but soccer is all year around for them. Everyone under 30 has given up the 'soccer is a commie sport, there should be no ties in sport' thing. The whole country sat down to watch the WWC final. Attention spans aren't long enough to enjoy baseball. It has a bit to go before it's on par with NBA or NFL but it's right up there with hockey and heading for baseball. The TV deals are key. In the age of Netflix, companies like Comcast (NBC) will do what they can to hold on to live sporting events. TV rights and club promotion are only heading in one direction and fast. It's similar to Sky in the early 90's in the UK.