I must like to stir things up. Below is Alan Aragon's rebuttle to Lustig's talk. Should make interesting conversation.
http://www.alanaragonblog.com/2010/01/29/the-bitter-truth-about-fructose-alarmism/
"On the contrary, bananas, grapefruits, Mandarin oranges, apples, grapes, watermelons, pears, persimmons, peaches, and strawberries are significant staples of the Japanese diet [17]. "
I find that hard to believe. I spent 3 months in Japan back in 2008-2009, spending weeks on farms near Tokyo, Kamakura, Matsumoto, and Kyoto.
Fruit is hella expensive in Japan and none of the families I stayed with ate any, except persimmons during persimmon season, apples during apple season, and dried persimmons over the winter -- roughly 1 piece of fruit per day. I wouldn't call that a "significant staple".
I'm talking 2000 yen for a single melon (over $20).