The problem is, that i've got 45k DGB in 48 hours @ miningpool.co, and that i've got 41k DGB in not even 15 hours @ smalltimeminer.com already, so it's almost 3x more, and difficulty is almost same (started yesterday at 19:15pm, it's 10:50am now and i've got
http://scr.hu/0fc4/mi9edWe are up and mining @
dgb.get-by.com and happy to have the hash.
That said, are you sure it wasn't just a really bad patch of luck for the pool?
If the total pool hash power is low, that could be the case.
Remember smalltimeminer has way too much hash power right now, thus less variability.