It's an intriguing site for sure, and it's quite entertaining to read some of it.
And there is definately a lot of knowledge there.
But, remember it is quite a specialized forum - first off its a piano forum (so its mostly pianists) and in addition you need to be able to speak the lingo and understand the culture (in addition to being a pianist). Such a specialized forum weeds out a whole lot of people from joining, and the end result is much more uniform than this forum.
The personalities and range of pianistic abilities are not quite as diverse as on this forum, due to the intense specialization and self-isolation of da SDC... whether or not this is good or bad is up for debate.