remember that this changes have to be done on the SERVER as well!! So when you join a server on HL, my guess is that you have about 1% chance to hit one that made these changes. For now at least till others start using these changes as well. Dont think 500 or 600 makes any difference.
And what is the problem with 0 ping???? I really still dont see what the problem with that is. As long as you can join without lag, a ping of 0 is something visual and not a real problem. When you get a ping of over 300 or 400, now that's a problem! :)