Just to display what I have noticed.
The Wireplay CS servers seem to be on a very good connection, there was problems earlier on, but these have seemed to have been resloved.
When pinging the server (ICMP packets) I get about a 30ms response time, which is probably as good as it gets on ADSL.
The snag is playing on these servers gives another story altogether. I rarely see my ping drop to under 80. Often its up above 200ms! Which is a bit insane.
I think a lot of this is to do with the amount of Foreigners playing, and maybe restricting it to UK networks only would be a smart move. The Spanish are the worse, no idea why, but they pick on Wireplay to play on. With their >400ms pings they will crowd a server and vote everybody out so they can have a clan game :/
Perhaps reducing servers to a more basic form. Put 3 on a box, with no admin mod or anything no cheat protection, and leave for a few days. See how they handle, then add the forth and see what happens. Then add cheat protection etc etc...