i don't notice a difference in speed, but i use newsgroups and have 10 connections to that and then try to surf the web and check emails. then it doesn't work as good without the patch.
people who use filesharing programs swear by this patch.
i don't use filesharing programs anymore, but from all the p2p boards i go to. they say this is a must for better speed. of course more connections coming down mean more going up 2.
i should note i use to use edonkey and did notice a improvement after using the patch. of course there whole system on edonkey is the more you share the faster you download.