^
Last update with One57 sales was in
May, with over 50% of the units sold for a total amount over $1B, all in only 6 months time. That doesn't include important information like what units sold, two very different stories if a majority of the trophy units of $30M and up are sold and thus make up a large chunk of that 50% number, or if a lot of those are still unsold. From the info we have, it seems like a lot of those have in fact been sold, especially considering the dollar figure of the units sold.
Either way, there is little denying the high end residential market is hot right now, and the sooner this project can be delivered the more likely people are to buy here as opposed to the other uber high end high rises planned in the area.