No, I think that the huge majority of cameras are fine and that the likelyhood of anyone buying a lemon is very little, and when that happens, Nikon will fix it through the warranty.
To me it took only a few minutes to decide if I want the D600 or the D800.
If I had time the same day I received it I could have tested it and been ready the same day.
All of your personal information and pictures will automatically be transfered to the new account.
However your conversations and favorites will not be transfered!
There is, however, a Pause option for those that don't need to end a date, but do need a quick break.
During the speed dating session, you can vote for the ones you like, and they'll of course vote as well.