Those that downvoted: was this too critical? Is it a mistake to be concerned with the quality of posts? I'm still new to HN and learning the culture: please forgive any trespass or offense I may have caused.
Try to go the extra mile in being polite. If your words can be interpreted as hostile, on the internet they will be.
Pointing out typos to the author is generally appreciated. There are two helpful things to do: Instead of just complaining in general, list the typos; and try to reach the author directly, e.g. by email.
English is my second language, but I'll take that question.
I believe is a matter of politeness and being helpful. You could have asked the author if English was his second language and sent him an email with a list of typos. Instead you chose to state publicly what you found wrong with the form of the post offering no possible solutions for the author and adding nothing to the discussion. Also, because you didn't write much, it looks like you are dismissing the blog post because of a few typos.
I get what you where trying to convey: typos are annoying, and sometimes they make consuming the content really difficult. However, to say that the concept was overwhelmed by typos is a big overstatement. I had no problems reading and understanding what Spyou was talking about, and for the looks of it the mayority of the readers did not either.
Don't mean to offend you nor make you angry, I'm sorry if it comes out that way.
Pointing out typos to the author is generally appreciated. There are two helpful things to do: Instead of just complaining in general, list the typos; and try to reach the author directly, e.g. by email.