So, I just finished FFXV's story (23 hours in)

[RenCutypoison]

Cirio said:
That... sounds very disappointing to me. Most people said it took them 100 hours to beat Witcher 3, but I beat it in 80 hours (I was highly satisfied by the game though). I was expecting FFXV to be at least a 50-60 hour game. Man, I should avoid all of these previews because the more I learn about the game the more disappointed I get...

From what I heard The Witcher 3 tends to have a lot of idle and walk time. FFXV completely avoids that in the main quest.