All is cool lisa, just making you work a little.
The problem with diets is that there's pretty much equal amounts of supportive and contrary evidence for just about every approach. You just need to find one that you can live with and that meets your needs adequately.
I do take issue with the statement that "[...] the simple fact that people who are vegetarians have necessarily controlled their diet in some way" is in fact, a simple fact. The truth of the matter is that vegetarians have made a conscious decision to limit or eliminate meat/meat products from their diet as best they can. Yes, they have controlled their diest, but that doesn't include having done so in an intelligent manner. I have come in contact with more vegetarians that simply eat the same as they did before, except that they took the steak off of their plates. They haven't done anything to their diet apart form removing the meat. That just isn't unhealthy, but downright dangerous.