[Cake] diffserv3 vs diffserv4

[Justin Kilpatrick]

"sqm-scripts used 3 tiers of priority pretty successfully as does free.fr. - de-prioritization seems a good idea, prioritization not so much."

This is the best comment on why diffserv3 is the default that I could find on bufferbloat.net. I'm interested in hearing about what data (anecdotes welcome) lead to this conclusion.

-- 
  Justin Kilpatrick
  justin at althea.net