Jonathan and Geoffrey
My data regarding the Long Island Sound microclimate are anecdotal, but not without substance. They all relate back to an old GCA thread where I expressed simlar scepticism as you have on a related issue (the ability of golfers using technology to predict wind shifts at a specific place and a specific point in time--the example was at the 12th at Augusta during the final round of the Masters...) with an NLE member (John McMillan). John said it was possible, I found this hard to believe, and used the example of highly experienced sailors on LIS only being able to sometimes being able to predict a more secular wind shift (i.e. over minutes rather than seconds). As did you, John asked me for proof, and by the time I got it (18 months ago), he was gone. As for the "proof," well John was right! My sources told me that there were technologies (radar/doppler, I think) which could predict wind shifts, but that they were not used in most competitive racing, for reasons of cost and fair play. And then.......
.....in the course of the conversation, my two data points (lifelong friends, each of whom is a world-class sailor--one aN America's Cup veteran, the other a Pan-Am games medalist) mentioned their observation of the changes in wind patterns over the past 10 years or the patch of water that they have sailed competitively for 50+ years, and the consensus reason for them (McMansions).
I hope this meets your standards of proof. I've been trying to confirm that this somehow relates to the Arts and Crafts Movement, but to no avail, yet, alas........