The monitor in the FCP lobby has now moved to the 55th floor. Current pace since the weather started improving seems to be about one floor per week, or maybe a bit faster. Still it's interesting contemplating that if this pace continues we're still looking at around a year to complete the project.
If they don't finish by the time winter comes, at least they'll be close enough to the bottom that they'll be somewhat sheltered from the wind by the buildings around them.
Also, as they go down the building, the supply line gets shorter, which will allow for a slight increase in speed.