I've only seen three, and I've read about another dozen of them (from that list of 25; so roughly 66% all together). ...But seen with my eyes, only 12%.
The thing I appreciate about Slant is they're consciously contrarian but create robust arguments for their opinions. I don't agree with all of them, but it's nice to have another voice in the mix. And they do tend to canvas films I'd ordinarily not hear about as well as more mainstream fare, so it's a site I visit regularly.