Thanks interchange42, that's probably where everyone is getting the 569 foot figure. I was part of the team that did the marketing video for the project when they were courting anchor tenants and that's indeed the height of the model we were given to animate. I don't have any records of it but I really seem to recall that they decided to lop off a few floors either just before construction started or soon thereafter. This kind of change would likely not have required any re-submission of documents. I sent an email to one of my contacts at Menkes but haven't received a response. Given the visual evidence I would venture that the Emporis figure is more accurate.