My average here has been just about 0.013btc/mhs. I have gone back and forth testing trademybit.com in comparison and there I averaged about 0.010btc/mhs actual takeaway after getting payouts and exchanging them and I had to hassle with cryptsy and a lot of "dust" coins that aren't enough to pay out or exchange.
I've been doing the same with trademybit over the past 24 hours; mh/s earnings are 0.00634, i.e. less than half of the average I've had at middlecoin, plus all the problems of having 0.01056 of an altcoin and therefore not being able to trade it until weeks have gone by. Switching back to middlecoin as we speak.