arronsky - 1:00 am on Jul 1, 2010 (gmt 0)
extremely well said, whitenight. Also, watching the video, MC wasn't as extreme as to say your site will be punished if you use nofollow internally, and he as usual had some clause of 'for unusual circumstances it's OK' which is the unusual case of the login page.
We don't know what to make of it-- we have not seen positive results from relaxing nofollow use internally, and quite frankly there ARE lots of pages on a large site that aren't that useful to waste not only Pagerank, but googlebot time. Robots.txt is one way to help, and nofollow (and canonical) are other avenues to curtail their indexing.