I'm not sure about the 7%, but, actually, being there with Kate seemed to make the whole matter very perfunctory. The interviewer was very polite, didn't really ask any probing questions, and wished us the best of luck. As I understand things, the two biggest reasons for further review involve children and past divorce as the paperwork goes up.
As for flight plans, I wish that I had that problem. Kate's visa is complete; however, she hasn't been able to schedule her final thesis defense. This inability is quite frustrating as it is finished and she could defend tomorrow. However, due to changes in Belarusian law, the earliest date looks like early September. Ugh... So, I will worry about flights at that time, but I'm expecting them to be much cheaper once the travel season is over.