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JGWeissman comments on The Graviton as Aether - Less Wrong
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Ok, now I am wondering how I completely missed that last paragraph. I agree with your nit-pick.
It's OK -- it's a matter of language, and not being very precise. Very loosely, in the case of a pendulum, you could say that in the upswing of the pendulum, it takes finite time (a delay) for the pendulum to respond to the downward force of gravity and start moving to 0. By the time it gets to 0, it already has momentum in the other direction and overshoots the equilibrium again. I see how this is the result of the dynamics being described by changes in the derivative of the motion, rather than -- say -- in the direction of motion itself.
Right. I'd describe that as a delay for gravity to finish overcoming the motion, rather than a delay in response.
There is no delay for the pendulum to respond to gravity, it starts accelerating immediately. There could be a delay before it achieves a velocity large enough to be perceived.