I never miss a title by Kurzweil :-)
He is brilliant. I think the drag of humans ablility to assimilate technological changes is delaying the singularity.
Did you see the New York Review of Books review of Kurzweil’s newest book? It is at http://www.nybooks.com/articles/archives/2013/mar/21/homunculism/
My husband’s artwork was used to illustrate the review (one on each page.)