"My simple premise was that the period of punk that Kosmo initially referred to (1976-1985?) did not "matter" to a large number of Americans."
In a sense, this is correct. (sorry for jumping in late) Back in the late 70's when the fun began the US kids did not have easy access to the music. Around here, aside from some college stations (WGTB) and one truly alternative station at the time (WHFS...103.1 Bethesda), there was no (relatively free) outlet for the music in the DC area. Back in the geezer days of 77-78 I was in high school, and nobody around me heard of the stuff I had fallen into. And those that had knew it as "punk shit" and never took the time to listen to it. I had to purchase music based on word of mouth and to some extent, reviews in CREEM and other magazines that were covering the scene. So yeah, it didn't matter to the masses. But, as Martha says, that's a good thing. Otherwise it would have been diluted much quicker than it was.