18k operations "per minute?"
You can do that on MS Access.
Why use MongoDB at all then?
We do thousands of transactions per second on mysql with innodb and SSDs.
In my experience, MongoDB and MySQL performance are usually on par. It's important to understand what the operations are before making any kind of comparison.
That said, I totally understand why this was your first thought. The article doesn't even state if the operations are queries, updates or inserts, let alone how many indexes or scans are performed...
To be fair, this is part of Mongo's pitch: come use a database, you don't need DBAs or people who know things about databases. Which is always gonna be kind of a lie. So they invite this on themselves.\
I hate when I get reduced to sounding like a mongo apologist, but it's their own fault for not following any best practices with data.