We visited WDW 10/17 thru 10/20 and witnessed on several occasions long lines at the FastPass return queue. They moved pretty steadily, but tended to block the flow of traffic in the area at times. I attribute this mostly to the new usage of the Magicbands and people getting used to them. But, I think there seems to be a lot more FP usage as well. Rides we noticed the back up were mostly all of what would be considered "E-ticket" attractions, like Space Mountain, Splash Mountain, BTMRR, etc. I wonder how this will be during the holidays?