From what I've seen (now) that seems to be about the jist of it. It could change in the future as more states make it legal. The cases I've done, if they use MJ in any form, its been tobacco rates. No different than chewing tobacco, with all companies but a couple, you still get tobacco rates even though you aren't smoking the tobacco.
The Dif is chewing tobacco causes cancer just the same, I've seen those picks with half jaws and such it seems the chewing is worse than the smoking, At least they make it out that way