The EGR is there to provide exhaust gas to the intake to reduce combustion chamber temperatures in order to lower nitrogen oxide emissions. The trade-off is lower performance, slower throttle response and less gas mileage. If you "floor it" or even ask for as little as 1/2 throttle, the ECM closes the EGR, but there is a delay there. I have an EGR disable switch in my car, because when my EGR stuck closed, I noticed quicker throttle response. The guy at the local garage explained to me that my quicker response was not my imagination and explained how it all worked.

What you are doing is introducing atmospheric air which contains a LOT of O2 (as opposed to exhaust, which doesn't), this means you are raising combustion temperature as well as upsetting fuel/air mixture. Or so it would seem to me. I don't see how this increases performance. Why not just put in my disable switch for those times you want quicker response?