It has no reflection on the general public at all.
Latest average polls will put labour at about 33%, Tories at 32%, UKIP at 14% and LD and greens at 7% each.
OCUK is a renowned right wing forum and these polls just highlight how far right they are. I actually take some comfort in the fact that despite being far right support for UKIP is only marginally higher, this would be a good indicator that they won't do as well as some of them would like to make out.
There is another possibility, the forum isn't quite as right wing as you think it is?
Indeed, lets have a look at last time:
http://forums.overclockers.co.uk/showthread.php?t=18142677&highlight=general+election+2010
Last time we:
Over voted conservative by 4%
Under voted labour by 15.8%
Over voted LibDem by 7%
Under voted UKIP by 0.5%
Under voted Greens by 0.6%
Under voted SNP by 0.7%
Over voted BNP by 0.1%
From that the only bias we seem to have is that we don't like Labour....