I haven't watched much Caesar Millan but in MY opinion, I believe there is such thing as being alpha/top dog.
Everyone has to remember dogs are not people. They are dogs, they are pack animals. Most dogs from the age of 4 weeks go through a process called subordnation(sp?). Its the time of a pups life where they determine where they stand in their pack. Beginning with their fellow litter mates. Have you ever seen a mother dog nip, growl or push her babies around? She is letting the puppies know whose in charge.
The alpha dog in a pack get everything they want. And thats what you need to be as a leader.
I'll probly get flamed, but I have no problem with the use of alpha rolling. I never used it with my dogs - I never needed too, but I have used an alpha bite with numerous pups in the vet.
If you try to push your dog off the couch and he growls at you, do you really think that is a training issue? No, he is showing you whose boss.
Dogs are not equal to humans, the thrive with a leader.