I love it when one American can definitively say "Most Amercians think this..." Personally, I love the World Cup. I look forward to it every four years (much more so than the Olympics).
So far, it's been a very entertaining Cup, with favorites like France and Argentina bowing out surprisingly in the first round. The USA isn't a lock for the second round, but I like our chances for at least a draw with Poland after watching Portugal trounce them 4-0.
And I also know a lot of Americans that ARE keeping up with the World Cup. Most Americans love sweeping generalizations. We don't have to think very hard that way. ;D