Yep- been in some FP+ lines that look close to that. I will say though that often the line is long before the 1st set of scanners, but once you get through those, it is clear sailing and won't even be too jammed up at the 2nd set of scanners. I think some of it comes from 1) people scanning and it doesn't turn green and then they hold up and block the line while the CMs try to sort it out, even if the CMs try to get them to move so one side of the scanners is clear and 2) people all trying to use a certain 1 of the scanners, instead of spreading out us between the usual 2 or 4 that are at the rides. I wear my magic band on my left arm, and it seems like 90% of people wear theirs on the right and all head toward the right scanners. CMs are always trying to get people to move use the left ones, but a lot of times they aren't being used and the line is backing up.
We have waited 10 minutes in line to get to the first scanner on Safari before, and then walked right on the rest of the way after making it through the scanner.