Sorry to say, but I can back up Heatherlite and say that I too (as I have earlier mentioned in this thread) have been offered Birkins without mentioning it. And it was via phone. I do not think that the SAs name is critical to the point being made at the end of the day...that some SAs operate different that other SAs and it really is the "luck of the draw" for each customer. Lucky one time doesnt mean we always will be...
I am weary of mentioning the SA because I can only imagine the deluge of phone calls the SA will receive. It's a question of just being patient and not expecting to be treated as "special"..not having any expectations. A number of SAs have my wish list. I never bother them with my requests again. I think they appreciate that.