For the average person, which is more likely?
(1) A hacker taking over their email account to get bank info, etc.
(2) Some nebulous threat from Google having too much information about you.
Google and Gmail offer some of the best security controls and threat detection of any webmail provider that I've seen (pioneered two-factor authentication for email, warn you about strange sign-in activity on your account, allow you to kill other sessions, etc.).
If the outcome of this kind of article is people move to less secure email because of some intangible threat, I think it's a net harm. Gmail is still the best choice for my mom.
I wrote about this more than a year ago at greater length on my blog: http://www.maxmasnick.com/2012/02/12/gmail_paranoia/ and there's more discussion on HN at https://news.ycombinator.com/item?id=3582609
My point is that any post criticizing Gmail for it's business model should also consider what is realistically a problem in the actual world (hacking) and hopefully offer some advice on what to do about it. I'm not sure this kind of "Google reads all your email and it's terrible. Full stop." post is very helpful.
Ok, a couple more things to preempt the inevitable trolling:
(1) Government snooping is a separate issue, but as far as I know there are no major email providers that a non-technical person can use that aren't vulnerable. We sorely need easy-to-use, widely used email encryption. Google isn't likely to do this because it would be counter to their business model, and this _is_ a problem.
(2) I don't use Gmail myself, but not because they are algorithmically reading my email. I switched (to FastMail) because I don't like the design direction of the Gmail UX, the FastMail UX is substantially faster, and the support is better (i.e. it exists). However, given that the average webmail user (a) doesn't want to pay for email and (b) is going to use one of the most popular services by default, I still think Gmail is a good choice.