Does Esenthel support model/mesh instancing on the GPU ?
So you can use only one draw call on the GPU for rendering the "exact same" model over and over again.
Instancing saves processing power.
And does the vegetation system also use instancing ?

Yes it is, just draw the same mesh multiple times.
http://www.esenthel.com/community/showth...6#pid19696

There's no hardcoded/specific vegetation system, but like objects always use instancing so yes.