I've been watching on and off.  Bicycle racing is actually interesting to watch on TV, where leaders can be followed and all attacks are shown.  I watched a leg of the TDF when I lived in France.  It was pretty boring to watch a bunch of guys go by and then nothing. 
 
  
 
I agree with what a sportswriter (can't remember which) wrote.  He said that American sports would be a lot more interesting if they had cars and motorcycles on the field while the game was played.