Gloria Braunschweig has been crazy busy lately, not only completing her new business novel "Rapid Implementation: How to Complete a Low-cost and Successful Business Management System Implementation", but she's also been fast at work utilizing RapidStart as a key part of implemention successfully Dynamics GP 2013.
Besides her book - which hopefully you'll pick up at Convergence! - she has some additional information you might be interested in regarding her recent experiences converting from QuickBooks Enterprise to Dynamics GP 2013. She has both a great blog, which I suggest you read closely, as well as a video on YouTube.
(If you don't have an MSDynamicsWorld account, you can get one for free)
YouTube Video: https://www.youtube.com/watch?v=HL77RXaOw0k
This material should be of great interest to you if you're considering a QB to GP migration!