I know this helps, it helped me.
Use the rates the server has. I believe these are right, if not type !rates in chat when you get in game.
rate 25000
cl_updaterate 66
cl_cmdrate 66

Make sure you type these into console. ONE AT A TIME. I try to help a lot of people with that and they type it all in at once, or they type it in on chat. So I'm just making sure you know.