On the second example, I was able to locate the picture simply by Google Maps. There aren't many buildings with domes on the top of it that is basically right next to water. It took me 3 minutes. Once I found it, I lined up the shot and found the building. There was only one it could have been. With a quick google search. To find which floor the picture was taken on, all I had to do was find which floor was completely straight in the photo (which means he was leveled with that floor) and then translate that height to the other building (by guessing). I guessed floor 17 which was one off and was the exact same guess as the blogger.
Basically, the blog post makes it seem he uses reflections to find where buildings were. In reality the reflections were not useful to locate the building, only to find interior shots after the location is discovered.