Today the Tiger analysis on "pre-game" with his driver swing that went left and his 2 iron swing that was a rope hook was beyond ridiculous. So the best way to determine mechanics is to use a swing where you are playing a specialty shot.
And from my experience, almost all method teachers are very ambiguous and then the golfing public just gets more confused. So IMO, even if they are 'dumbing it down', they are not doing the golfing public much good. There's ways to explain this stuff, without dumbing it down so it's so ambiguous and still get people to understand it.