I don't believe the skip action can be described as "tap". It's definitely "press and hold", in a way that engages the trackpad's physical click. Personally I don't feel like I need to excert any more pressure on the trackpad when skipping ahead, than I do when I'm doing an ordinary click (not a tap).
Would you say that if you press the trackpad until it clicks and hold it there for a while skipping does not work, but instead you have to press down even more firmly after you hear the click before anything happens?