One last question, have the lines at the attractions grown since the installing of FP+?
Some have (particularly attractions that didn't have FP before, but to which FP+ was added) and some of the headliners have gone down slightly.
From what I've read, the most significant increases have been at Pirates of the Caribbean, Haunted Mansion, Maelstrom, Great Movie Ride, Star Tours, Kilimanjaro Safaris and Dinosaur -- their average wait times have
doubled. Wait times at Spaceship Earth and Star Tours have
tripled. (Granted, in the case of some of these attractions, we're talking about an average 5-10 minute wait "doubling" or "tripling" into 15-20 minutes -- not an unreasonable wait time for any attraction, but still, it's more time than you'd have spent in line for the same attraction a year or two ago...) Average waits for Jungle Cruise went up by 15 minutes.
By the same token, wait times for Little Mermaid, Peter Pan, Pooh, and Big Thunder Mountain have decreased by about 5-10 minutes each. (Touringplans also says that Expedition Everest and Tower of Terror waits have gone down by about 10 minutes.) Journey of the Little Mermaid wait times decreased 20 minutes. Wait times for every other attraction, in every park, have stayed about the same. (The information on which I'm relying comes from a site that I can't link to here -- go to easy wdw dot com and look at the March 9, 2014 blog entry. It shows the wait times for various attractions both pre and post-FP+. To be fair, touringplans' data shows increases/decreases for pretty much the same attractions, but shows more modest gains and losses in terms of minutes in line).
Just to give you an idea of what this looks like in practice, when I "re-evaluated" my Day 1 touring plan for my family's upcoming visit to the Magic Kingdom to incorporate touringplans' new post-FP+ estimates, our time standing in line (during a 6-hour touring day) increased by over 30 minutes. (The increase came from the fact that we'd planned to do Aladdin's Magic Carpets, POTC, Jungle Cruise, and Haunted Mansion in the standby lines that day (all attractions for which wait times have increased), but were using FP+ for Big Thunder and Peter Pan (the two attractions on our touring plan for which average wait times decreased a little -- since we're using FP+ for them, we won't be seeing any "benefit" to our touring from the decrease in their average standby wait times).
More information here:
http://blog.touringplans.com/2014/04/03/how-fastpass-plus-affects-your-wait-update/