I think the picture is a bit deceptive. It looks as though the tower is right at the street but in fact it is a block away. I think this is mostly because the photographer zoomed in to get closeups, so we think the tower is closer when it really isn't. A much better prospective can be had by going to the OKCTalk webcam which is located on the 16th floor of the nearby Oklahoma Tower:
http://www.okctalk.com/images/pete/webcam/DevonConstructionCam.jpg. In the webcam, you can see the building compared to other buildings, people inside the building, and vehicles - then you really see how massive it is.
to give perspective, I believe the first 6 floors have heights of 18 feet, and the first "two" lobby floor/s have a total height exceeding 30 feet. I believe the "normal" floors have 15 feet heights. I think the floorplate will have over 26,000 square feet (don't quote me on that), but if so - that is quite large. ... Hopefully someone in the know can confirm this. Take a look at picture 5 which shows the podium, you will see a man standing on the first floor of the podium - if he is 6 feet tall, just see how the first floor ceiling towers over his head. .....
Seeing the man in front at the fence, the glazing, and the angle of the picture (and HD zoom) throws off the actual size of this building. Which would (as others have said) make the tower look slimmer and hence much taller than it's actual height.