Title: "Why Facebook Comments Is A Bad Idea For Your Site"
In the article: "Perhaps in some contexts it makes sense"
Parts of the post sound very contradicting to your actually post title.
Regardless, to answer your third bullet, yes the author can setup Facebook comments to give him/her notifications that you did leave a comment. Granted, I guess there is no UI to let you know that the author was notified, but most blogs (not using Facebook comments) don't have a UI for that either.
I personally like Disqus comment system on blogs because it gives you the option to comment in various ways. It's a win-win-win!
I am the author - The article lists reasons where Facebook comments are a bad idea for your site, it is not a generalization.
I mention that in some cases it might make sense to have it - but in the case of technical or professional blogs / articles, that usually is not the case.
Parts of the post sound very contradicting to your actually post title.
Regardless, to answer your third bullet, yes the author can setup Facebook comments to give him/her notifications that you did leave a comment. Granted, I guess there is no UI to let you know that the author was notified, but most blogs (not using Facebook comments) don't have a UI for that either.
I personally like Disqus comment system on blogs because it gives you the option to comment in various ways. It's a win-win-win!