It has long been thought that ghols were nothing but stupid feral creatures, not able to even hold a strategy within thier minds before Balor bent them to his will. However I have found compelling evidence that it is not so. Strangely, the evidence has been right in front of us the whole time! In Myth TFL, if you look at the flavor texts one reads something like this:
The Trow Emissionary said "if you do not submit, we will fell your people like pine trees", the ghols asked why he had singled out pine trees, to which the trow responded, "Once cut, pine trees never regrow" to which the responce was only silence.
Look at the line THE GHOLS ASKED. Obviously, to asked a question such as "why have you singled out pinetrees", you need to have more communication skills than grunts and snarls.