If they split NA / EU, Id hope it would be 2 continents, so that there was a clear definition between them and not some weird timezone line.
For me its not about ping, I have to agree with others out there that its about times of battles....if something important happens at 2pm i cant be in the battle and thats the best part of strategus so that would bum me out. sucks having to work 9-5, i know ;)