Yes They could have until July 2, for sure. NYSE evidently just speeded up NJ to 50ms, so it just got harder. GS still might have an edge, depending on the speed of their new processors and switches.
This is where the NYSE is going. I am not in IT, but from the little I know, I believe that the two tier system, when fully implemented will be a lot harder to front-run. http://www.articlesbase.com/informa...iper-boosts-the-speed-of-economy-1047008.html