The real issue is overselling, where ISPs sell you 6megabit bandwidth and then actively sell more bandwidth than they actually have available, knowing that most people don't use up all their bandwidth at any given time. Then they QoS it so nobody completely loses internet due to bandwidth dropping. They are upset now because more and more people are actually using that 6mbps (or 50mpbs, or whatever). They got used to overselling when all people ran was ftp sites with static bandwidth limits and web servers (or browsers, on the home end).

Now they want you to buy 6mbps, which isn't really 6mbps, and pay more if you actually want to USE 6mbps.

note: I use 6mbps because it's what my ISP supposedly provides. I frequently max it out.