Originally posted by long pig
Batgirl is stated as 3x human speed. Batman is peak human. Literally dozens. Especially wally Kid Flash in the eighties. His ability to do this is a combination of speed and his mental ability to instantly play out and plan for basically any possible event that could happen. almost as good as precog. in fact DC said they intended on him having precog at first. Which explains a lot of his early 80's Flash feats.
She was stated to be 4x "baseline," not knowing what the baseline used for the calculation the statement becomes ambiguous. It was however stated in the same issue (on the next page I think) that she wasn't superhuman in any area, so we know that the most her 4x baseline could possibly is peak human.