The problem with that statement is that up to a point, more vapour = more flavour.
A well built cotton setup will put out more vapour than a well built mesh setup even before you reach silly cloud chasing territory.
more vapor does not necessarily mean more flavor.
the same coil setup with cotton or mesh will not produce more vapor. the cotton and mesh are just wicks.
when you have too much airflow (more clouds!!), it cuts the flavor of the vapor. if the vapor's too hot, then the taste dulls as well.
there has to be a balance in terms of airflow and chamber size. smaller the chamber = higher concentration of vapor inside. that will give more flavor.
that's also why the smaller atomizers are known for flavor (cyclones/rm2/other 14 or 16mm atomizers/micro chambered gennies/etc)