Newsweek today reported the results of a Swiss study, published in BJOG: an International Journal of Obstetrics and Gynecology, which concluded that there is no such thing as a "normal" vulva, due to the vast variation in size, color, etc. In a study of 650 women, of various ages, the researchers measured various genitalia, including the clitoris, labia majora and labia minora and found that "vulval appearance differed significantly woman to woman." It goes on with much more detail, and I am sure you can google the entire article up, if interested (unfortunately there are no pictures, or even diagrams).
In a similar survey personally conducted by BadBoy over the course of 48 years with more than 200 women, he can confirm the Swiss study findings, and can add his finding that they all taste different too.