Renato, if as it appears you're now acknowledging that the wind may have been worth 1:30, then I don't think our disagreement is that substantial. In your second post on this thread on page three, your wrote:
"So, my personal evaluation of the advantage is no more than 40 seconds, because we know the real technical value of the athletes, and cant be surprised from their results."
I agree with 1:30 as the minimum amount of aid (perhaps more), but I concur that we are speculating and thus offering educated, or not so educated, guesses.
The other area of agreement is that athletes such as Mutai and Mosop, who are in their prime and perhaps in 26:45 shape, are superior to marathoners from a decade ago and before. However, Geb, even if he was slightly past his prime when he became a marathoner, was a superior runner at his best (in comparison to Mutai and Mosop). Certainly Mutai and Mosop are much better runners than Salazar and Beardsley, who dueled to a 2:08:51 and 2:08:53 finish at Boston on a somewhat warm day, so I have little doubt that if the 2011 versions of Mutai and Mosop had been in that 1982 Boston that they would have likely been worth about three minutes faster than Salazar and Beardsley. However, if you place the 1982 versions of Salazar and Beardsley in the 2011 Boston, what do you get? I don't know, but likely they would have been within one minute of Ryan Hall, who is not substantially superior to Salazar at his best (at least as I see it).