The argument is circular. The claim is that time sped up so that millions, nay billions, of years passed in the time of a few modern years. You cannot prove or disprove this because this is what in physics is called a coordinate change. You get a clock where a million years is represented by a second. So you rescale all of your equations to the new clock, up to about 10,000 years ago when you revert back to our ordinary clock. It isn't even a slight of hand. There is no trick at all.
God gave us a universe where the laws of physics can be written in a form that is immutable under such coordinate changes. The number of revolutions around the sun, measured relative to a very distant galaxy is the same, whatever clock you use to tell years. In fact, that is how astronomers used to define a year [now it is so many vibrations of an atomic clock - but that is to indulge pedantry that makes no difference to the present argument]
Besides, God can't just "speed up" the universe, "run the tape forward" and then slow it down for appearance sake. That would require the one thing God himself cannot do: LIE. Such insanity makes God a liar, and that I won't accept.