WTC— The shit-talking down at the World Trade Center, such as in today's dueling press releases , is getting more varied. A tipster sends in the above photo of some Port Authority signage along West Street that suddenly seems a bit poorly placed. Commentary from some construction types? [CurbedWire Inbox] FINANCIAL DISTRICT— Amenities at luxury rental building 20 Exchange Place include, according to its website , a 24-hour doorman, concierge service and state-of-the-art fitness center