Sneakylong This is an interesting post in that I think it points to a need for tailoring instruction to a person's body and natural tendencies. We tend to think that there is a one-size-fits all approach, and that is the swing swung by the pros. As is being discussed in this thread, that's not the right thinking.
I have a friend who has a really strong, solid build, with a lot of upper body strength and very little flexibility (and, from what I have seen, very little sense of rhythm or gracefulness -- think "bull in a China shop). He played pretty good golf with an entirely arms-driven swing, moving his hips VERY little, and noticeably pausing at the top of his swing before firing his hands. Not exactly elegant or graceful, but it was effective.
When my friend started struggling with his game and went for a couple of lessons, the pro immediately identified the problem as not rotating enough and not getting the club to parallel at the top. He started having my friend work on this, along with trying to create more tempo and rhythm. These are all good things, but I don't think they are right for him, and his struggles only deepened. The pro's response was "Just keep working at it." I think that's completely wrong, particularly for people who don't tend to practice much (which is most people). I suggested that my friend look at Trahan's swing because it is arms-driven, which matches up with his build and natural tendencies. Early indications suggest this is the way to go, but we'll see.