I'm a newbie : I can't say if this is good or bad  just now
I'm just saying some guys here have 2 to 4 times more unexchanged than exchanged.
It looks like these users mine on eu server.


Sure but some guys here have probably bills to pay before litecoin hit 200$ or doge 1000$ !
A few pointed out that litecoin wasn't the most profitable coin to mine now (and if they would have wanted to mine litecoin there are many litecoin pools with smaller fee).

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://bitcointalk.org/index.php?topic=409172.0

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.

1EEGpYrCKxJimB7Jo1D4nBRzi7pvh3VrC   4.2223   0.2796   0.00651059   0.07350344   0.02888455   1.28094040
162Lrh1EFAvXeic9HDeRGsMA5pCD3mAn9b   4.2223   0.0280   0.00355367   0.12304414   0.03109341   0.83964517
1GChndr2eQfwB7cyK3jxhJJdGun9Ee9az6   4.2129   0.0839   0.00372663   0.08306378   0.03272269   0.36935321
151CYmhGJTw43St6fhn4X7Siyxih6adRR2   4.1850   0.0186   0.00368038   0.06620929   0.02830306   1.06750391
1AXAZWxQbmaFYAsEig2hJYEZMTebJoDa25   4.1663   0.1398   0.00374808   0.07267726   0.03030780   0.55848931
1Ju17f48pq5BhxHAbUAoBVjaReKdSss2y6   4.1197   0.1118   0.00282152   0.09052342   0.02799723   0.53031023
1AsrCmjQRgDVCLEXUHEn2q2RUUgfC4os1L   4.1011   0.1398   0.00670922   0.09848383   0.03931271   3.54139749

I got a few Sapphire R9 280X Dual X
Hashrate is generally between 700 and 730 KH/s

my settings
-I 13 -g 2 -w 256 --lookup-gap 2 --thread-concurrency 11200 --gpu-engine 1035 --gpu-memclock 1500

I never managed to get more than 650 KH/s with only 1 gpu-thread  (-g 1) even whith higher intensities (-I 20)

I'm using Trixx to handle the fans (custom graph with 100% around 70°C)  and to set the VVDC to 1.100
The low voltage gives no noticeable hashrate drops but lowers significantly the temperature.