I say that whatever you can do to bring a realistic, truthful performance out of yourself would be the 'right way' to act. So, what's right for one person may not be right for another...so, I would agree that there is no one 'right' way to act.
__________________ Sometimes you just have to say...meh.
I totally agree. All those methods that they teach you in acting class are just "tools" for when you can't do it on your own, naturally. So whatever it takes to be "real" is right.
The right way is the one that connects you to your audience and carries the story, thw wrong way is anything less, so the answer is more or less yea and no. Check out dramorama.com for some great tips!