Here is clear, intelligible writing about the problem of congested access to broadband networks (read Comcast, Verizon, DTAG, etc.):
"Five of those congested peers are in the United States and one is in Europe. There are none in any other part of the world. All six are large Broadband consumer networks with a dominant or exclusive market share in their local market. In countries or markets where consumers have multiple Broadband choices (like the UK) there are no congested peers."
See that? This is the most comprehensive and clearly I've seen Level (3) write about this phenomenon.