I doubt that you'll find someone who can confirm so easy.
Am able (on Sky) to access all the sites mentioned on this article.
I do however, strongly disagree with the sentiment that this filter is "Just another attempt by the Tories to prevent people finding out information." It's not, it's just a very poorly implemented filter by the ISP's that can be 'hacked' with a simple proxy.
We had to deal with this kind of filtering many years ago back at school, where even the word 'mobile' was filtered.
1. Easynet - all work fine.
2. Andrews & Arnold - all work fine (this is expected)
3. O2/Sky - all work fine
4. BT - all work fine
All of these lines were provisioned before the porn filter was announced so...
Edit: tested Amnesty, OpenBSD (which these machines are all running and would be a PITA for me) and linux.com
http://www.aa.net.uk/kb-broadband-realinternet.html
This is the correct solution to the problem.
This is different to the proposed uk gov porn filter.