There's people that can go into oodles of detail over at the dslreports.com forums.
It's not DSL centric by any means, and there's forums for every major internet connection type.
I used to tweak my connection settings by editing the RWIN and some other data back
when I was using mobile broadband by sprint. There was a fair amount of difference in ping and
up/download after I did the tweaks. How well those same tweaks would affect a landline, is debatable.
http://www.dslreports.com/forum/r18650881-Evdo-Tweaks-and-TuningAgain... find the section for your type of connection, and ask questions (first read the FAQ for that section in the left
hand side bar or you'll be run off) there. The stuff in the link above was for mobile internet, the Dr. TCP would
apply to you, but there's no telling what the values would be for your connection type. That's why you need to ask
people that know.
What FUBAR said is correct - in terms of ping isn't the same as bandwith aka how much water you can carry in
the "tube." All you can do is clean up/tune up your PC and connection to run at it's optimum, then you have to work
at it from what servers give everyone the best overall experience.
Personally, I wouldn't trust anything put on youtube.