Hey guys, wanted to bring to your attention in case you missed this thread, might want to check it out.
http://forum.ppcgeeks.com/showthread.php?t=63811
if you want to skim through it and skip to good stuff check out post 100 and on page 12, post 113 (to know how to enter the data), and post 118. Just installed the tcptune from the first page and followed post 100 instructions along with post 118. so far I have noticed an increase in data speeds but will test out further tomorrow. good luck