This is exactly how I do it, literally word for word (I take the keys out of the ignition and put on them dash board). 90% of the time things go smooth as a baby's bottom (i've actually consented to a vehicle search twice, and both times they didn't even bother with it). A couple of times I've gotten real assholes though, and even after maintaining my cool copper just kept going off on me. FINALLY he got the picture that I was a decent guy, snapped into "chill mode" and let me go without so much as a warning.
I don't like the fact they can see if you have a CCW or not when they run your plates (all though I certainly understand why it would be beneficial), I can see alot of Cops using it as a profiling tool.