I actually think Jamie is right. I don't think it is so much the foul language, but that you have to wade through tons of crap to get to the interesting bits.
If you haven't seen a change in C9 in the past few weeks/months then you've probably not been here long. Ask anyone who has been here over 6 months whether the C9 forums are now better or worse than before, I think most answers will be negative.
C9 is losing valued contributors with interesting and relevant things to say because children are allowed to treat the forums as their personal playground, with no boundaries on the amount of abuse being dished out - see the thread where Orbit threatens to
set someone on fire for example.
As for Jamie winning a debate, it is starting to be a long time since I've seen one on C9, so he hasn't had the chance - they may be there but they get buried beneath a lot of crud, insults and general childishness.