...is apparently becoming a reality, with producers like Copain's Wells Guthrie bringing in his next batch in the 13% range and vowing to get in the 12% range in the vintage following. An interesting prospect, since so many California winemakers have stated directly to me that they find the high alcohols disappointing but impossible to avoid without reverting to reverse osmosis or something. But if Guthrie can do it....
Anyway, interesting article, link below, with some interesting tidbits re Siduri and a few others.
http://www.sfgate.com/cgi-bin/article.cgi?f=/c/a/2011/03/11/FDB11I6Q5P.DTL

