It’s hard to tell when the economy will be back on the upswing. Dan Doctoroff recently gave a rousing keynote speech to a Citizens Housing and Planning Council luncheon crowd. He recounted the 7 (or was it 17) downturns NYC has faced since the 1800s, all of them doozies that caused someone or other to remark that New York would “never” recover. If clapping could bring recovery – just as millions of children have brought Tinkerbell back from the edge of death with each reading of Peter Pan – it would have been done last week at the Marriott Marquis.