What an unpleasant attitude. People have emotions. If they're apologizing, maybe they feel bad. Accept it and get on with your day. A punctilious email etiquette isn't going to improve anything.
The author does not seem to be advocating in favor of punctilious etiquette so much as simply getting the point.
Well, to be honest, for a lot of people, apologizing for late answer is more a social convention or a reflex than real apologies.
The same for : "How are you ?", "I hope this email finds you well" or worse than everything, Emails Greetings embedded into the signature.
I actually really liked the post. I'm often prone to apologizing, thinking that it's a social expectation, and the post made me smile and relax a bit, thinking to myself "oh, maybe it's not that important, and it'll be ok if I don't".
Responding too quickly to emails is the same as responding too quickly to IMs, it will often invite more responding.
I don't know, it seems pretty light-hearted. If they sent this directly to someone in response to an email, then I may agree, but since it's more of just an opinion blog piece, I find this to be a good outlet for thoughts to share without really impacting anyone.