It may also depend on your ISP connection.
I made those changes and mine seems to load pages much quicker. I have tested a few very heavy graphics pages. They do seem to load much faster with those tweaks.
This is true if one were on dialup. Too many connections, and the browser either slows down or worse yet, locks up. The max connections setting set at 30 means one connection is for retrieving the page, and the other 29 connections are used to grab the graphics (29 at a time).