I have 3 miners on ethermine, my reported hashrate is 555 mh/s.
NB: I just switched a miner on dwarfpool to see if I have the same result... I will let you know.
Rather than hashrate, look at the income. Friend of mine have done a 3 month test and he told me on dwarfpool, the hashrate was 10% to 20% higher hashrate than ethermine and yet ethermine payout was 10 to 20% higher than dwarfpool. So what is the point of an amazing hashrate and poor payout. I then did some tests and my tests were similar to my friend.
You should never mine at these pools, dwarfpool, miningpoolhub, suprnova and many other pools are scams.