We were on the Magic in May 2012 (before FTTF),
on the ship by 11 or 11:30, (waited only about 30 minutes or so because they were not cleared to board yet),
our room was ready by 12:00, (Maybe since we were on Deck 11, and there aren't as many cabins?)
luggage at our door by 1:30.
When we went to Grand Cayman, we did not really have that much of a problem tendering, so I do not see a big advantage.
Now, if FTTF gets priority tendering BACK to the ship, that would be worth it, because we stood in line for about 30 minutes or so in the very, very hot sun (no shade), and the line kept getting longer and longer behind us, some people may have waited as much as 45 minutes to an hour (guessing).
Magic 05/19/2013 - Western Caribbean
Magic 05/13/2012 - Eastern Caribbean
Conquest 05/22/2011 - Western Caribbean (first cruise!)