Thanks for posting that! These excerpts from that article, albeit not directly from the Toll Brothers VP, might be the most salient:
"Of course, as a publicly traded company, Toll Brothers must answer to shareholders who expect steady and rising returns, another reason the company plays it safe rather than pushes the boundaries when it comes to urban luxury residential development."
"Toll Brothers didn’t get to be the nation’s largest luxury home builder by getting ahead of its customers. And if what its customers want is suburban-style living with an urban address, then it will give it to them."
TRANSLATION: look for Toll Brothers to be in the rear guard of higher-density mixed-use development in Philly, and not on the leading edge.
Also, at least in this region, Toll Brothers generally doesn't build in the highest end of the market.