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.