Edit: Sorry, it looks like this was explained after I had loaded this page. Still, this seems like a partial reversal. Also, this story is at #16 on the front page and really should be at #1 considering the magnitude of the change.
Oh and just one more question: I'm seeing this comment at the top of the page. Is that just how it looks for me, or is it that way for everyone because of the new ranking algorithm?
Another edit: From PG's explanation, I thought the gray dots were all turned red, but I still see gray dots for some comments (including one with a negative score).