I think they're talking acceleration, not velocity? Hubble's law says more distant galaxies are receding faster than slower ones at some calculable rate, but it

I think they're talking acceleration, not velocity? Hubble's law says more distant galaxies are receding faster than slower ones at some calculable rate, but it doesn't say the rate at which they're doing that is accelerating over time. (I do find it kind of shocking that one can prove this without observing the same thing over a prolonged period of time.)