everyone (else) seems to be hating on atheists

[Annik]

Scientists certainly do "trust" this test, as it is extremely well-established and reliable method of measuring personality. That's why you see it in so many peer-reviewed scientific journals. The fact that you tried to dismiss it as "just" a personality test is rather suspect in this sense. Given your selection of wikipedia articles, I don't think you are very familiar with the big 5 method of measuring personality.

You'd be wrong.

http://en.wikipedia.org/wiki/Big_Five_pe...Criticisms
You'll refer to the second section of the link to get a better idea of what I am talking about.
You'll also note that that I do not dog the test itself, but the biases of the people taking it. The Big 5 is the best test of personality we have, but that says nothing about the people who answer untruthfully. Additionally, personality is hardly a hard science. Anyone who has been through a Theory of Personality course is aware of the highly subjective nature of studying personality. You'll note the Big 5 is based off of one of them: http://en.wikipedia.org/wiki/Personality_psychology
I do believe the Big 5 is a more objective test, but the bias lies in the person taking the test, not the test itself.
Also it's a test and measures personality. Hence, it is a personality test.