old vs new

Just playing around here...
Don't you hate when all your midtones are properly exposed but the sky is completely white :roll:
What do you think, is it blatantly obvious that I added in the sky afterwards?

http://img.photobucket.com/albums/v37/rmwatt/Architecture/DSCF0023a.jpg

Well... something doesn't look quite right, I'm not sure I would have been able to put my finger on it that the sky was added in afterwards (though since it came from you, I may have guessed it. ;) )

its that building that looks weird. Its the tilt of it. I wouldnt have realised that the sky was put in post, but im a PS idiot, so there ya go. I would have thought there would be some reflections in the windows of the buildings of the sky.