Take a ride on a 60' sport fish running 25 knots in 4' seas. You will be amazed how smooth a ride it is as the boat is cutting though the upper part of the waves as opposed to bouncing up and pounding down on them.
I've done exactly that, actually. A few times. And also at 14 knots on my 56 Hatteras too. Of course it is smoother than slow trawler, or a smaller, lighter boat but a) it is not "skipping over the waves" and b) it still pounds as it hits steep head seas and blasts through them. Following seas, a different matter.