We have 4 Servers in the USA all of which are located in LA, California.
LA and a few other major cities have the best internet infrastructure which is why the service is so reliable.
We have Gigabit connections to Level 3, Savvis, Mzima, Cogent, AT&T, and XO which means if one goes down the others still go on working.
I have seen cases where service was not available throughout the whole country due to carrier router problems and servers located in a city where few lines are coming in.
LA is a top choice for a datacenter if you want the best service you can get and it's response time to Asia is very good which is another plus.