Should we not wait for callbacks after methods connect and end in mysql NPM lib?

[João Pimentel Ferreira]

I made this same question on SO.

The npm lib mysql says I should use it like this

Is this really correct? Should we end the connection before the callback? Should we not query only after the connect() has finished?

In all my projects I've been using async.series to be sure these steps are run sequentially:

Am I being too verbose?

Thanks