They're completely full of it. Yet another reason not to go with them, if these idiots are going to lie about their upstream providers. They are Incero resellers and ColoCrossing resellers. That said, Incero has a PHENOMENAL network. You can't go wrong. I have quite a few servers with them and they are great.
Here's straight from their website (blog) not too long ago:
"Our provider Incero uses a state-of-the-art, fully redundant data center located in the heart of Texas."