Well I am in the process of downloading SP2 now.
While its downloading I thought I would take a look at the Change log.
Not much to excite me until I found this:
"SP2 removes the limit of 10 half open outbound TCP connections. By default, SP2 has no limit on the number of half open outbound TCP connections."
Now I know that most of the issues people have with slow downloads has often been put down to the fact that there has always been a limit on the number of half open connections. Even Windows XP had a limit despite there being a patch to the registry for both Vista and XP to open more up.
Will unlimited half open connections help download speeds?
My install has just started so I will let you know.