It's real hard to resist mining DGC with this profitability level so I quit mining BTC/LTC for a while and tried again DGC. Yes, I know, I'm stupid...
Same dissapointing results as before: net income is FAR, FAR AWAY from what has to be. I'm in BigVern pool and is giving me 0.16 DGC/block (0.16 DGC every 3 or 4 minutes) with my 5 MH/seg miner when it should be giving me 1 DGC or more per block (more than 20 coins per hour). A f*cking joke.

Perhaps the pools are struggling with the hash rate?
I am on bigvern's too and it seems to be working for me.
What I found works best is if I use the cgminer --load-balance options with two pools, then if something is a bit funny with one, it will put most of the effort into the other one.