> measured relative to the rest frame of the CMB > preferred While these are meaningful conventions, they are being measured with respect to that rest frame.

> measured relative to the rest frame of the CMB > preferred While these are meaningful conventions, they are being measured with respect to that rest frame. The local group moves at some few hundred km/s velocity relative to the CMB, so the age of the universe in our reference frame will be slightly shorter than that preferred frame. Call it ~10^-7 shorter but still ever so slightly shorter. That was my point.