Dont find a chart, but absolute yes, it did raise a lot.
I was using coinium for a while and then tried poolerino per suggestions in the thread. I got more than twice as many coin from coinium.
I would average 100 coin overnight on coinium, only got 34 from from poolerino.
Low hash rates stink. I wish I could afford a good card.

edit: I haven't been paying attention, did the difficulty jump up in the last day or two?