So Skyscraper Center finally added The W/Element to their Philly buildings list earlier this week.
http://skyscrapercenter.com/city/philadelphia
One interesting thing to note is that they have this building topping off at 617'. That would be a gain of 35', if accurate. Now it could just be an error, but the other info on the building is consistent with the info we have (51 floors; 2017 completion, etc).
I will point out that the site still has SLS at the old propsed height of 562', when the last (and hopefully current) proposal was 590'.