Yes the feed button turns the pump off for 10 minutes and then it turns back on.
For what its worth, the lowest setting on the pump is 1/2 power, with 10 intermediate settings. I've read others say that it takes a long time to ramp up to the desired power level, but that's not true. I would guess that it takes 10-20 seconds for the pump to reach the speed you set it for.
I'm very happy with my DC-8000 for my 110G tank. The pumps are so cheap, you can buy 2 of them to keep one as a spare and still be under budget compared to a lot of their competitors. I have tested mine with a power meter and it does draw the amount of power that Jebao rates it at.
I don't have a good way of measuring the flow, but compared to the drain sizes, etc., I can tell it does flow pretty close to what its rated for.