Tell me if I'm wrong, but I believe most of the F|A servers are located in the USA.
Although a great amount of ET players are European, you choose for a server in the USA. Which results in a high ping for almost every player:
I do not know where you guys are hosting and I do not know if it's easy to just change the server. I'll leave it up to you, but you probably don't wanna change it.
Just a suggestion.