Yeah I have been told that as well, in fact I received a DVD explaining the use of the Jake brake and particulate filter regeneration from Dodge about 2 months after I bought my truck. I always use the Jake brake, which saves wear on the transmission and brakes too...
As an after thought, on my truck I have to manually push the button after every time I turn the truck off. My neighbor has an '09 cab and chassis; he never has to push the button, it stays on. I wonder if there is a way to change mine so I don't have to push the button...