199.6, on a good day I have 18 ping, 1/1.2 K/d. I almost always kill myself each round though, so I don't really fit in to the test data.
I believe ping would be a greater determining factor than your reaction time. Even 50 ping could really be hampering your abilities to the point you will miss a block if your reaction time isn't less than the average. 50 ping would be adding something like 100 to your reaction time.
Also experience is much better than being fast. Many situations I survive simply because I know what's going to happen next, blocking it as it happens is a sure fire way to die to another's experience/trap simply because there is way more information to process than just swing direction.