Interesting point: out of my mothers group of 10 ladies 2 follow SOS. Our babies don't cry much at all and are happy. And sleep through the night. 5 mums (not SOS'ers) either have gone or are booked to go to sleep school with their bubs. Of the ones that have gone they have been taught various things which are in the SOS book but certainly arent unique to it. (get rid if dummies, put bub down awake, don't feed to sleep).
Not saying it works for everyone or the mums that go to sleep school are bad mums.
I will say however that the bashing on here is not impartial, fair or even informed. It is heavily biased: people that dont like schedules and are more suited to attachment parenting should never try SOS. At times the bashing is vindictive and bit?hy. It's the same with all the themes in here where there are vastly different philosophies; circumcision, abortion etc.
Whether you are a fan of the methodology or not at least acknowledge that it works for some. Pretty darned well.