My miner doesn't support dwarfpool. If you can raise 1 BTC (with a group of people), I will add support for it.
I had some time today to sniff the Dwarfpool connection. Strange that after all this time, they would choose to implement a non standard version of the stratum protocol. So its a Dwarfpool weirdness issue. Regular farm mining through eth-proxy works just fine. Im noticing a 7 Mhs increase in speed and more consistent mining speeds on my AMD rigs.
all this by using the eth-proxy instead of stratum mode with genoil miner?
I would love to use the stratum mode of genoil's ethminer but it uses a strict implementation of the original standard stratum protocol which Dwarfpool it seems unfortunately does not. So, while it does connect and authenticate, it never actually gets work. The speed improvement though is in the optimizations in the miner that genoil has done, eth-proxy is merely a bridge.
Just a quick empirical sniff of the network trafiic to and from Dwarfpool seems to show that Dwarfpool is expecting a hash rate from the client which can be enabled or disabled in the original ethminer but is not in the genoil version. There may be other differences, I just have run out of weekend to dig into it.