I bet you that hardly anyone knew that the line was listed at 4 hours. And I would further bet you that the actual line time was not anywhere close to that number.
Twice last month at WDW I saw astronomical wait times, that were not correct. First at TSM that line was listed at 160 minutes after we exited with fast pass. As I was twittering that queue time out, the number dropped down to 80.
At ToT the line was listed at 120 minutes, I thought that it was strange as RnRC was only 70 minutes. I decided to at least stand on line while I was making my decision and noticed that I was standing in about the same spot as I was earlier in the day when it only took 40 minutes to go thru the line. Sure enough, I was at the ToT lobby by 20 minutes and thru the ride in 50 minutes. When I asked the CM why the posted queue time was so long he told me that if they have to take a ride off line they double the posted queue time. So a high queue time serves as quite a deterrant to others getting in line.
I told this to my kids at the EOD when the TSM posted queue time was 110 minutes. I bet them that the queue wasn't nearly as long as posted and sure enough they finished the ride in 35 minutes.
I don't think Disney is deceptive, but they sometimes overmanage customer expectations. Best thing to do is find out where the end of the line is and make your own estimate as to actual queue time.