NO, apparently I was given a bit of misinformation on another site...obviously I should have double checked but I'm just one person and I can't run down every detail to doublecheck unfortunately. Thank you for letting me know, I edited my essay.
I STILL 100% believe RepHresh is best at keeping pH low for cutoff timing and I have never ever thought that there is anything "magic" about acetic acid. I hope this doesn't put people off of using RepHresh because acetic acid or no, it IS designed specifically to lower the pH of everything it reacts with to 4-5.