one57-craneKatherine Clark of The Real Deal’s report last week that the “irrational exuberance” among developers of apartments for the super-wealthy is waning, according to participants in a recent realty summit, seems to confirm anecdotal reports that have filtered into and through Gripepad in recent months. “The market today is very slow in terms of high-end condo sales,” Related CEO Steve Ross said. Realtors working the high end have recently whispered that sales have stalled at a certain already open-for-occupancy West 57th Street supertall tower and that the developers of others, just rising out of the ground, are wondering where all the billionaires and easy money have gone. As reported in my just-published profile of Aby Rosen in Centurion magazine (teased yesterday by Richard Johnson; check back here for a link when it’s unlocked), Rosen has priced many apartments at his new Sir Norman Foster-designed 100 East 53rd Street well below $10 million–and that’s looking all the more like a clever move. While Robert A.M. Stern‘s Fifteen Central Park West clone, 220 Central Park South, is said to be selling at a rapid clip, this news could darken the holidays for other developers. But look on the bright side: This could mean Central Park won’t soon be totally cloaked in shadows.