I stopped reading the Tesla motors forum. It seems to have a lot of "Tesla Haters", and people misinformed about the company. (lot's of comments about how Tesla would not survive without their hard earned tax dollars). This site seems to be made of people who are more 'in the know'. They are long time owners or long time fans that read everything and talk to everyone to be best informed.
The TMC forum is moderated so there isn't name calling or abuse, and humor is very welcome. I feel like TMC is a community of like minded folks sharing their passions, while the Tesla Motors Forum is kinda like reading something on the web and then looking at the comments below, random uniformed "let me put my two cents in here" kind of stuff.
Sorry, this is sounding harsher than I mean it to be. Please take this with a grain of salt, I didn't give Tesla Motors Forum much more than a few tries, but once I found TMC, I found I spent more and more time here.