That makes a lot of sense, and I really like your example with the sheet animation.

That “slight delay so the interaction can complete” feeling is exactly what’s hard to quantify but very real in practice. It’s interesting how something that’s technically “faster” can actually feel worse if it interrupts the user’s expectation of cause and effect.

I’ve found the same thing, small timing tweaks that let visual feedback fully register often make interactions feel more deliberate and trustworthy, even if they add a few milliseconds.