Given the typical lead-time for an article to appear after the vendor is notified, the news begins to spread, publications take notice, assign someone to write

Given the typical lead-time for an article to appear after the vendor is notified, the news begins to spread, publications take notice, assign someone to write a story, and the story appears, then you're arguing that the term "zero day" should, practically speaking, never appear in the press. I'm not sure that's a helpful definition. It's pedantic to the point of no longer applying to any real-world situation and thus sort of pointless.