I would implore some reading into the origin.
Cliff notes version, things that happened around the same time:
* Dev+Ops days is made by Patrick Dubois, the intent was for Sysadmins to use Agile ("Agile Systems Administrator" was the desired job title), he used "dev"+"ops" to signify a unification in working methodology, not as a team
* 10+ deploys a day from Flickr; where the authors are in a single unified team of sysadmins and developers.
Like Agile, people always claim you're "doing it wrong", which I find ironic given that the portmanteau was created to bring Agile to systems administration itself. However, devops was confused right out of the gate.
Your definition is the 10+ deploys a day talk.
I actually wrote a blog post about this: