While I was in Australia they had Super Bowl parties too, and I even got the day off to the embassy Super Bowl party each year (our Sunday is their Monday). American Football is a growing interest over there, at least as far as I saw. Not saying it comes close to comparing to Aussie Rules or either of the rubgies, but it's probably as popular as soccer.
But yea, the fervor that accompanies the SB and playoffs don't come close to that of the World Cup, but they're not totally comparable since the World Cup is every 4 years. Better to compare that to the Olympics.
Yea, I noticed after I posted it could be taken to mean "has players in the NFL" rather than what I meant "has players that belong in the NFL". I meant the talent level part you mentioned. Not one of the App St players is worth a poo, whereas Harris is solid, CJ was a talent of the "burns the brightest burns the quickest" type, one time superstar, and Joseph is also solid. I'm not familiar with Wilson though.