For some reason I doubt the findings in this study (and the others that I have heard of with similar results). Although I know there are women out there that prefer average length, I think the vast majority of women prefer 8+ inches, and maybe even 9+ inches. I was about 7 inches BPEL and 6.75 inches NBPEL before I started PE and when I was in good shape, and I always remember feeling like the women could take more and did want more. That is my idea and I think it is true despite what these studies may say.
I honestly think when women say they prefer anything less then 8 inches, they are doing so to make the guy feel better. Plus I think that most women believe that guys with big dicks are more likely to be players or to cheat on them, and that explains why they say they want average/larger side of average.
Girth, on the other hand, I agree with. Most women want a huge girth even if they don't care much for a long dick.