I just looked at my T/A's old carpet, stashed out in the garage (I never throw anything away!). It has the brass grommets too.
I'm guessing this is a situation where there were different vendors or design revisions during the course of the year(s), some had 'em, some didn't, and the only way to know for a particular car if it had the grommets or not is if the original carpet is still there or like in my case, stashed away.
I assume these new carpets will have the molded in heel pads not stitched?