Well it definately isn't a "fact" that penis size will increase as a result of FR alone so yes, I think you should move that one to the subjective category. Actually, I have a friend here on the forum who isn't around much anymore, but his name is Swedeguy. He is an adult male who was circumcized a few months ago (he is in his 20's) and after healing from the surgery, with no Penis Enlargement, he actually GAINED a fraction of an inch of girth.
Now, this doesn't "prove that circumcision increases penis size", although you use similar accounts to discuss the proof of the merit of FR, but I really think that we don't have any definitive proof of the benefits of FR, besides having a flap of skin over the dick head and a more intense odor as opposed to not having them.
-Skepdick