nah, satoru isn't actually top of the verse speed wise. He can instantly teleport but he has to use blue for that. If he was instant fast he would not have gotten chumped by Toji who is faster than gojo even after awakening.
Heh I decided to google this fic on a whim and found you posting here, was concerned it was a copy poster but it seems not, I'll support you here too! (from SB)