I'm from CZ and my net conection is optical, so thats no reason to have bigger ping , ping on other kind of servers is OK, normaly on lagabuse.com is also about 20ms , but sometimes i've more than 60ms, i know that 60ms is nothing, but when i've it small lags and delay starts.
But now i'm trying new analyse of set-up priority in windows and it seems to be OK.
Gest regards
lamma