People who don't think with a security-first mindset or who prefer to gain the benefits of cloud-integration with their devices.

Is that what I have? A security-first mindset? Honestly it never even crossed my mind back in 2010 when I bought a Nexus S that the thing to do was put the keys to the kingdom on something that might fall out of a pocket somewhere... silly me; I just made a separate account and I don't use that account for signing up other accounts or whatnot; when that account gets compromised they'll find precious little of value.

It never occured to me that anything sent or received from a gmail account was private.

I take that as validation; the stuff that matters to me isn't on Google's systems and never has been.

I got down-modded pretty badly for my first comment; apparently that was terribly offensive. I don't really care much but it is very telling; the same folks that wail and moan endlessly about having their privacy compromised by Google et al. apparently don't hesitate to make it trivially simple to do so.

This is a good point. In a certain sense, all your webmail accounts are already compromised. It's just a question of "by whom"

[edit: substitute 'cloud' for 'webmail' to get an idea of the full range]

It's not. In fact, Google has the right to publish your private emails if it's for promotional purposes. The worldwide unrevokable license they grant themselves to everything you store on their service has no requirement that they don't publicize private information. Check their Terms of Service.

I don't see a '/s'. I'm pretty sure the majority of users on portable devices connect their primary accounts to it.