A commenter
http://www.treehugger.com/files/2009/09/nanosolar-solar-powe...
makes an interesting point about the true gains in efficiency. The second press release:
http://www.nanosolar.com/company/blog/nrel-certifies-164-nan...
states:
"In terms of our current baseline production process, our best production rolls now achieve higher than 11% median efficiency measured as equivalent to panel efficiency, with very tight cross- and down-web uniformity."