I remember attending an auction by PNAS, where it is being said that there will be unification. It was early this year or maybe late last year. And nothing came out of it. This prove that there was two separate groups since (they want to be unified?). I asked around and everybody was smiling for us newcomers. A veteran told me that there are "established and rich" people in the first group and "young and aspiring" people in the second group. The way it sounded, the speaker do not want to be part of the quarrel. We the newcomers will also avoid siding with anyone since we are just in to this hobby for the fun of it and to learn more.