To be honest I think it's more of a Nissan thing. My mother's Altima had the Intelli-key, and her's took a sec before it would start cranking as well. I've had a few Chrysler rental cars with the push button that would start cranking as soon as you hit the button.
It does seem to start faster if you just push the button and release instead of holding it down. My issue is finding the one spot on the clutch that actually trips the sensor for starting. I'll get in, hold the clutch down, and hit the button, only to realize that it isn't down far enough.
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2009 Nissan 370Z Base w/ Sport Package
F.I . LTHs with Non-Resonated Cat-back exhaust (C.F.) / Stillen Gen3 CAI / Up-Rev Tune