I am a big fan of the Ideological Turing Test, and applying it to different domains, and I was happy to participate in this one. However, I wonder whether this is an appropriate domain.
I think the ITT works best when there are coherent and well-defined opposing positions, of roughly equal size and intensity. The abortion debate is a good example - while there are differences in emphasis and gradations of support, it is clear what the two sides are. Other good examples are the minimum wage debate, the global warming debate, and the debate. The ITT works worst when the positions are incoherent and ill-defined, or of grossly unequal size and intensity. "Was Tony Blair a good Prime Minister?" is a good example - it's not clear what it means to be a good Prime Minister, there are people who (dis)approve of him for diametrically opposite reasons, and his detractors are much more invested in the question than are his defenders.
Sadly, vegetarianism is much more like the latter than the former. Some people are vegetarians for health reasons, others for animal welfare reasons. Vegetarians typically feel strongly about the issue; non-vegetarians simply don't care about it, and have typically not considered the issue nearly as strongly. There is no "opposing side" to vegetarianism that would drive the ITT; all that links non-vegetarians is that they don't find vegetarian arguments compelling.
Come one, come all! Test your prediction skills in my Caplan Test (more commonly called an Ideological Turing Test). To read more about such tests, check out palladias' post here.
The Test: http://goo.gl/forms/7f4pQfxB8I
In the test, you will be asked to read responses written by rationalists from LessWrong (and the Columbus Ohio LW group). These responses are either from a vegetarian or omnivore (as decided by a coin flip) and are either their genuine response or a fake response where they pretend to be a member of the other group (also decided by coin flip). If you'd like to participate (and the more, the merrier) you'll be asked to distinguish fake from real by assigning a credence to the proposition that a given response is genuine.
I'll be posting general statistics on how people did at a later date (probably early September). Please use the comments on this thread to discuss or ask questions. Do not make predictions in the comments. I got more entries than would be reasonable to ask people to judge, so if your entry didn't make it into the test, I'm sorry. We might be able to run a second round of judging. If you're interested in judging more entries, send me a PM or leave a comment. I tended to favor the first entries I got, when selecting who got in.