First you must differentiate between the vocal, the occasional, and the departed. Technically most accounts are Nintendo followed by Sony and then followed by Microsoft. That however does not translate to which camp brings the most traffic on a daily basis. The Sony camp is definitely the most vocal.
The Nintendo camp is basically spent. A year with no major titles, poor port support, and a poorly balanced library will do that. The camp was massive early in the generation, but it just could not be sustained. Most of the camp is departed. A early victory followed by a massive drought conspired to cull the heard.
The Microsoft camp was always the smallest of the three. In spite of the sales difference it is a very different breed. Remember the consoles bread and butter is online play. Factor is a large library with a lot of cheap games, and you have gamers doing what they are prone to do play a lot of games. What has not helped is the fact that Microsoft defeated Sony, and before anyone bitches please how possible is it for this to change? This camp is mostly occasional they come by from time to time, and will chime in on a thread when they got a moment.
The Sony camp is directly in the middle. The most expensive, the most ridiculed, and mired in third place. Who would have thought that would have happened. Though it seems to have lead to a massive inferiority complex. When your used to winning the fact that you are losing bites hard. Though to be honest its only a matter of time before this group too mellows out, and isn't quite so vocal. A lot of them are still screaming, because they have yet to realize the battle is over.
I actually expect the community to find an equilibrium by the fall, and move forward to actually discussing the pros and cons of games, genres, and game against game comparison. Without any dramatic shift in the next few months the deranged fanaticism should be put to rest once and for all. Everyone should accept the outcome by that point, and then the camps should just blend together. The vocal nature of some members is just prolonging what most everyone already knows. This console war has been decided. Though even they cannot drag it out for a year.