I'm not disputing that the eblades are lighting quick... but there are a whole lot of delays in there that u have to put in to make sure the bolt doesn't move back whilst the valve is still open, that it also doesn't move forward before the hammer has latched, before a ball has dropped into the breach (and has stopped bouncing in front of the eyes) etc etc.
I'm not saying that these delays make it slower (the Nexus is a prime example that it isn't) but it's definitely a more complex firing cycle, which means there are more places that you can screw it up if you dick about with the settings.
What I'm saying is that if the Eclipse boys can squeeze that much performance out of a cocker, expect miracles with an open bolt.