At 2200rpm, my stern is squatted down in the water, I am using alot more fuel and gaining a 1/2kt over 2000rpm. I am going over the boats hull speed and am at it's physical limit. What you call "power sailing would not gain my more than a 1/2kt. My boat is what used to be called an auxiliary, back when engines were an auxiliary form of propulsion. Now adays it seems people use their sails for auxiliary and/or entertainment and their engines to get the boat back to the dock in time. If you need to go faster than sails will allow then maybe you should trade your boat in on a "stink pot". If a knot or too stresses you out you need to spend more time sailing...put yourself in a position where you don't have to be any where or back from anywhere at any time special.
To those of you that this does not apply, please don't be offended, because it was not directed at you. To those of you that this does apply, don't get offended either, just learn to chill.
And for those of us with MacGregor motorsailers, like my old 26X?
The best of both worlds ... and the worst.