No. I simply missed the part where that was relevant since the PhDs did not have to be in a related field. They could have PhDs in anything at all as long as the signer has a BS. I guess you missed that part.
Just because they repeat the 9,000 figure over and over, it does not suddenly become relevant if those 9,000 were not all qualified to give an opinion in the first place.
What does 9,000 PhDs mean to you?
It should mean nothing without further information on how they were qualified.
Go back here: http://www.ecogeek.org/content/view/1654/73/
Look at some of the people they dug up who signed it. Dentists. Mathematicians. Medical Doctors. Veterinarians.
The White House didn't even think it was worthy of comment: http://worldnetdaily.com/index.php?fa=PAGE.view&pageId=64866