Which part of the article gives you the impression that the author doesn't understand that? He specifically calls this integration, and his problem is that it is done badly.
"""I'm flabbergasted that you have a problem with this since this is the main goal for Apple."""
Wait what? Apple goal is to "take hold of the information market that resides within social media and use this information in combination with adwords."????
Even if you replace adwords with something else, like iAds, this doesn't make sense.
"""(I assume that you have Apple products, since you talk in such lengths and positivism of Siri) Google+ is also not about a social graph, it's about doing social media the right, natural way."""
In what way is Google+ more "natural" than Facebook?
Also, "positivism": you keep using that word. I don't think it means what you think it means.
"""You also don't understand how Adwords works when you talk about Siri. A 'click' is a hit to the page, be it a click, enter, wget, or voice search of Siri. So searches in Google with Siri will earn Google money."""
No, they wont. This doesn't even make sense. For one, Siri could bypass Google altogether --the user is using primarily Siri, not Google, so the results could come from anywhere.
Second, even if Google is queried, Siri hides the Google results page and just returns the appropriate result as a spoken list. Do you really believe people would pay if their ads are now shown to the end user?
"""Also iOS uses Google Maps as it's map application so Siri uses Google Maps, you just don't see it."""
I'd guess the author is well aware of this. Are you aware that Apple has bough a mapping company and is looking to integrate its own maps in a future iOS release?