I am not so confident as Mr. Wall. Perhaps I use a different Googlespeak parser.
Yes, I expect that many of the smaller sites and 'content' networks will be 'caught' by the redesigned document-level classifier
but I am not holding my breath that the large venture capital backed scraper/content mills will be touched.
Add in the increasing popularity of 'curation' sites and I fully expect increasing numbers of verticals/niches to be dominated by various combinations of (1) Google properties, (2) service partners, (3) minimum content farms, (4) curation sites aka directories 2.0, and perhaps some dominant sites.
I should like to be wrong, but Mr. Cutt's post content is something of an annual occurrence.
What the past and likely near future tells me is (1) it continues to be worthwhile to look elsewhere for traffic, (2) it continues to be worthwhile to leverage Google properties and service partners, (3) it is increasingly important to block or leverage the major content farms, and (4) it is critical to learn how to leverage the curation sites as they are the current enterprise growth area.
The sky is not falling, but the dark search results clouds continue to swirl, if in some new patterns.