Excellent deconstruction of Mark's post. I'd add one point:
I thought that Mark's post was valuable in understanding the perspective of some hiring managers or investors since inevitably a few of those people will be looking at my resume. But I was not convinced that Mark's hiring filter was the correct approach to hiring. As an entrepreneur you're the underdog and need to find ways to do more with less. If all the big name companies are afraid of job hoppers, then you should be looking even harder at job hoppers. Your best chance at finding that diamond-in-the-rough employee is to take a closer look at the applicants that were never really evaluated at other companies because they were "caught by the filter."