Not really. These exemptions are given to athletes all the time. Interesting that they failed to leak the names of the other high-profile athletes who have also received them.
What of GB's would Russia have won? They aren't really competitive on track anymore and the few field events they excel in would not have affected the GB medal count.
Already at 100 medals with several more opportunities to come. This really has been a dominant Games for the US. Should easily beat London's total and could threaten Beijing.