So interesting! Why do you think the trend on Long Island is still 35? There aren't too many B's in my neck of the woods (more Chanel than Hermes, really), so I don't really have first hand knowledge of this.
I also think B35 is the most showy size. It is very noticeable and recognizable. The thing I like about B25 is that in my city no one really recognizes it other than tPF folks and that makes me feel ok wearing it to work. The one time I brought a B35 to work I received way more comments than I am comfortable with.