I was surprised that the article didn't just jump on the Google bandwagon. If you just read the first page, you will get that impression. But reading all the way to page 6 leaves you with the notion that if Google could catch-up the features in its calendar product then the analysis would definitely trend in their favor. I must confess that a lot of the references were directed towards analysis performed last summer. That is about 11 months ago and as I read it, I am assuming that some of that gap has already been closed. In fact as I'm writing this I just reviewed the capabilities in the Android calendar and I think it is close, but not quite what I get in my outlook calendar. I consider myself to be a power user when it comes to calendar functions because of the number and complexity of the meetings I schedule.
The knock on the GMail solution has always been security; that we can more finely control the security provisioning of the Microsoft products. I am getting the sense that with the Google Apps, that is not the case. A couple months ago Google reported that its single sign on security provisioning system was hacked by someone. In reading the detailed stories in the NY Times, it was clear that other companies email systems were also hacked, but that those companies chose to not publicly disclose the incidents. Were they referring to Microsoft? It's hard to say. But I trust a company more if it can accept that bad things happen and tell people that it has taken steps to correct the issue. I think Google has done the responsible thing. I have seen too many zero day patches from Microsoft to think that they have always acted as responsibly.
Anyway, I have been a vocal proponent of considering GMail as an alternative to Exchange/Outlook. This article proves that there is merit in at least doing the diligence in considering it. I'm not saying the the GMail solution is the answer, only that it is ripe for consideration.