I don't think it's a first/second language issue, but rather a "how to present ideas in written form" issue. The GP is not criticizing typos, but rather the way

I don't think it's a first/second language issue, but rather a "how to present ideas in written form" issue. The GP is not criticizing typos, but rather the way in which the article is structured. If the post were written in Spanish it would have the same issues - just in Spanish rather than English. I actually think the (quite nice) blog formatting might be partially at fault: whenever I read a paper, I expect a certain style of writing and ideas presented in a certain way. By presenting it visually as a paper and then using a casual blog style, my first thought is not "this blog post is okay" but rather "this paper is bad".