I agree with you, believe me. I think the MOD thread is laughable at times and that people make the same mistakes over and over is very stupid, frankly.
The difference is, though, that this time there's 20 years or more of teleconnective science which is pointing towards something. This isn't just the usual 'there's something showing at day 12 despite the fact that most large-scale drivers aren't indicative of such', and to completely dismiss the current situation is to ignore the incredibly hard work of some of the world's most knowledgeable and respected meteorologists.
I'm not saying a cold spell is nailed on, but I think the current negativity from a few is unwarranted and too hasty a dismissal of the current known science.