I too have learned a lot. Here is the original article that Phil posted last year:http://www.ironbutt.com/ibmagazine/ironbutt_1002_62-66_Hot.pdf
around here are based on one article by one doctor published in one non-medical journal." That is a fact... But since you mention it if you have more info than the one IBA article referenced please list them, or PM them to me, as I'd like to read them. I'm curious how using the removable rain liner in a mesh jacket might be able create the same or similar results. Kind of the "best of both worlds" concept if you will...
And you're just plain wrong, Wayne.
This comment isn't to say riding dressed the way the articles author, and some folks here, advocate is "wrong". If it works for you and you are comfortable with it go for it...ride your own ride.
All the tips listed such as wetting down shirts, wet neck towels, cooling vests, etc all help but the real key is to stay well hydrated regardless of whether you wear a t-shirt, mesh jacket, or a riding suit while riding.