At its heart it certainly is. If not this argument then what? The claim is made that the tissue removed contains some percentage of the overall nerve endings in the penis and that removing them decreases the pleasure experienced during sex. The original claim made was:
"Dr. Hinchley counters with a recent study that showed the uncircumcised adult penis is more sensitive than the circumcised penis, largely because the five most sensitive areas are removed during circumcision. "This implies a reduction in future sexual sensitivity for circumcised adults."
I have not read any claim that the nerve endings were somehow of a different nature and that removal of the sheath eliminates these 'special' nerves and their 'special' function. The claim made is specifically reduce sensitivity = reduced pleasure.
John Thornton