The Mexicans in CA are all watching it. It's on in every Mexican resteraunt I have been in since the tourney started.
I estimate that 50% to 75% of Americans are watching the games on Univision as well. The coverage is better, and the women wear less clothing.
I'm surprised Mexicans are still interested in the World Cup, especially after their team lost to Argentina 2-1 (overtime) with one of the most beautifully-executed goals I've ever seen.