This picture is taken 13 minutes after the one with the mystery team: http://www.flickr.com/photos/78286753@N00/6540491345/
All of the other Brenchel pics are taken later than that.
If the time stamps on the photos are correct it means the mystery team (Dave and Rachel) reached the roof first followed by Brenchel with Art and JJ in third. It also means Brenchel spent almost 50 minutes on the roof. Long prep times or rooftop challenge?
That may or may not be true. From the the photos we know the following:
1) The timestamps on photos of mystery team (Dave & Rachel?) gives us the best evidence that they were the first to start ascending the cables.
2) Mystery team had one member severely lagging the lead member on the ascent (having covered less than half the distance up the building while the lead member was almost at the top).
3) In the same set of photos, team Brenchel was seen almost at the top of the building just 16 minutes later.
4) Team Brenchel was the only team that the same photographer captured descending the building.
Based on point #2 above, plus point # 3... fact that team Brenchel both were at the top just 16 minutes after the lagging partner of mystery team still had more than half way to go, when combined with point #4, I think it's likely that team Brenchel overtook mystery team on the way up the building and was the first team to both reach the top , and therefore the first team to start descending.
The only thing that doesn't compute in this scenario is that the timestamps of team Brenchel descending are 50 minutes after they were almost at the top while ascending. Why the almost one hour delay between the near end of the ascension and the beginning of the descension? But on the other hand, why no pictures of the mystery team descending if they were the first team to do so?
I wonder if the photographer could give us more details. I noticed that on the photographer's flicker account page there is button to "send flickrmail" to him. Does anyone here who has a flickr account want to try to "flickrmail" him to see if he can provide more details of what he saw that day?