Neighbors say: not so much.
Yes, the google group thread which started this whole discussion did mention a so-called cat lady, but the consensus seems to be that she’s not to blame for the rise of the kitties.
According to the Examiner, the colony has “roamed the streets in the Lower Haight for decades.” Furthermore, the Examiner quotes a couple of Lower Haight residents – Patricia McFee and Thea Selby (Selby being president of the Lower Haight Merchants and Neighbors Association), who not only don’t blame the unnamed cat lady, but assert that she has helped capture and domesticate the cats so that they might be put up for adoption.
So, maybe there are no villains in this story. That doesn’t mean there can’t be heroes! If you have feral felines in your backyard and you live on the block bounded by Haight, Fillmore, Page, and Webster (or heck, no matter where you live), get yourself a free trap from the SF SPCA and help find these critters a proper home, would ya?