Premier League pulled as many as 750,000 viewers this year for some matches. Not sure if that's TVs as opposed to proper viewers (50 people at The Playground at 7am on a Saturday) ... or internet streams.
And, again, the matches are in hte morning... beneficial against college football (hand egg), but for me in the left coast, regular matches started pretty early and the early matches, like @Man Citeh started at like 4am. So huge chunks of our populated (and football happy) left coast were probably still counting sheep.
With NBC giving proper coverage and with BeinSports showing La Liga, Serie A, Ligue Uhnnnnnnnnnnn and some Budesliga, we'll have more and more youth growing up seeing it at the same level as the NHL/NBA/NFL, something that has been long absent. If we can continue to develop the MLS as well, we'll continue to grow the sport.
It will supplant hockey, I believe, as the 4th. And I say this as a huge Bruins fan.