Really not worth having an argument about this. I wanted my peers to know about the "S" mark so they do not get taken in by a seller who does not tell them it is from an Hermes sale.
All I can say is that this year 2012, every single items that my friends and I looked at, tried on and or bought has a "S" on it and we bought scarves, shawls, hats, twillys, RTW, gloves, men's shirts, shoes, sweaters, and towels. Nothing from June 2011 which I bought had any mark nor did the scarves and slg from 2010 and 2009---I can only speak from my experience.
I appreciate your effort to educate other members. I just think it's important not to use terms like "NEVER" or "NOT" or state something as absolute when the opinion is based on limited experience. Maybe say instead "this year all my sale items had the S mark, whereas my previous sale purchases were not marked. Does anybody know what the logic behind the marking is?"