Yeah, unfortunately the backdrop still has way too many image features in it.
Photosynth is locking onto all of them and it messes with the reconstruction.
You can see the camera positions by clicking/tapping any photo in the synth and then pressing the [M] key to pull up an overhead map.
Alternately, press the [C] key to toggle to global Camera mode and zoom out to see where Photosynth calculated the camera positions in 3D.
Whereas for a Spin, the camera positions should be roughly along the arc of a circle, here, they're closer to a straight line because of all the common background.
As for the current description of the synth... that's not a man.