Is raw meat more healthy for dogs?

The bone and raw food diet or BARF as it is refered to is certainly better for the dogs, at the moment my 2 are are a complete dry food, as it is cheaper and more manageable especialy with no freezer space to store raw food, some breeders will wean the pups straight on to a raw diet.
I have known many dogs who have been fed raw and their coats are always better than dry mix fed dogs.