This is true, but cable networks tend to degrade because of the way bandwidth is shared compared to DSL connections, and actually gets worse with higher adoption rates. It has to do with where the connection is actually multiplexed.

Check out the section 'Shared Bandwidth' on wiki: https://en.wikipedia.org/wiki/Cable_Internet_access

Check out this comparison: http://www.bestbuy.com/site/tech-tips/compare-cable-dsl/pcmc...

And check out the post by Net_Sharing in this forum: http://www.dslreports.com/forum/r28980221-Speed-Does-cable-b...