Alright, I read the article and I don't have any new understanding of the genre. The article just gave an idea of the history and this certain group of "mumblegore" filmmakers. Unless my reading retention is really that bad (not out of the question) that was about it, so I'm not really going to write about the article...
I guess for the second part of the prompt: reaction to the genre. The fact this genre is out there and is being seen by the mainstream and whatnot makes me pretty happy. From what I've read about these films, it seems that these are decent films and that's really cool. I think the popularity of the genre is good and that filmmakers that don't have a huge budget/ any at all can make a film that the world can see.
I also think it's cool that these people can get the same desired effect of fear as any of the studios and now the competition has to do with the actual craft and better horror movies should come from it.
I like the idea of the general aesthetic and again I really think this is a great outlet that has the potential for the best of creativity to be articulated and be seen by the world.