I think that quote could also be interpreted as saying that Google simply didn't see it as a change that qualified for the program, not that they weren't planning on fixing it. But again, I could be entirely wrong; I have no experience with either the team or the program. I just have a hard time imagining any of the engineers that I know there getting assigned a bug like this and clicking 'working as intended - will not fix'.
It is a script that allows one to control behavior (even though in a limited way, but yet authentic way) of Google's web property.
Why did they say that this was not a security sensitive issue? And why did the tone change upon seeing public disclosure looming?
Anyways, I am not happy about handling of this situation. Good on Tom for being responsible, and the exploit did not wander into irresponsible hands. Because, within a day everybody on Google Scholar would have got this exploitable email.