Not really connection problems, just a few getwork failures.
But I still have a large amount of unexchanged coins, I'm not sure if it's related to the eu server, but it looks like.
I compared my stats with 30 users around me in the table and found 7 with much more unexchanged than exchanged.
I dunnow if they are also mining on eu server.
hashrates are around 4.2 unexchanged balances between 0.06 and 0.12 and exchanged balances between 0.28 and 0.39
It goes from 200% to 400% of unexchanged coins.
[...]
Me and my friends mining eu as well 3 times more unexchanged than exchanged by now.
I read earlier that eu was mining (only?) Doge.
Maybe all these unexchanged are related to the Cryptsy maintenance ?
http://www.reddit.com/r/dogecoin/comments/1uwp79/dogecoin_removal_on_cryptsy/
https://bitcointalksearch.org/topic/doge-on-the-climb-and-suddenly-removed-from-cryptsy-409172