Verizon's is not that robust and they dont reach every business and user in the world thus they are peering with others.
"Verizon has received top Metro Ethernet Forum awards around the world for its leadership and innovation in developing and delivering Carrier Ethernet business services. In addition to earning the Global Service Provider of the Year award for the fourth consecutive year, Verizon received two Carrier Ethernet Business Application Awards for Asia-Pacific, the Best Marketing award for the Americas and the North America Regional Service Provider award."
Yup, totally not Robust at all. Nah, perhaps I'll believe the Metro Ethernet Forum.