I don't recite that. I have it printed on a piece of card stock about the size of a business card and I hand it to them along with my driver's license, proof of insurance, and registration. I simply tell the officer I am exercising my right to remain silent as I hand him/her these items - then I shut up.

I've only used it once and it seem to work. So I guess I can say I have one data point where it was used. My attorney friend has this printed on his business card and this is the advice he gave me - to do the same.