Rupturing The Nanotech Rapture

I suspect the author is yet another person who observes near-term engineering problems in a narrow area, while underestimating accelerating returns and ignoring the developments in converging fields. He says he hasn't seen much progress in nanotech in the last 15 years, but then critics of the Human Genome Project scoffed at the 1% sequencing achieved after 7 years (halfway through the project), even though the project was completed a couple years ahead of schedule. But it's still an interesting perspective, and he does ultimately accept that we may achieve achieve the goals of advanced nanotech and the technological singularity, just not so soon nor through the same methods predicted:

http://spectrum.ieee.org/semiconductors/nanotechnology/rupturing-the-nanotech-rapture