It's all time peak is higher than Witcher's. Not saying it's a better game, but his image is relevant despite the age difference between the games.
More people preordered Witcher 3 than have bought KCD yet. Steam charts don't really denote if a game is doing better or worse. KCD has only just broken 1 million sales. On Steam sure it's doing better than Witcher 3, but I haven't even played Witcher 3 on steam, I honestly don't know anyone who has they either got it on console or pirated it.
I also don't know why Mookie got so offended and started listing charts and stats in the first place? I didn't say I hated the game, I just said I was done with it until mod support tools are released. I thoroughly enjoyed the game even with its flaws but the open world is a barren wasteland of few random events and few interesting things to explore (though I did go to the bottom of a mine which took about 30 minutes and found Sir Ulrich still down there just waiting). I'd much prefer if bandits repopulated camps and the like to make the world more interesting.
As for the Hype it didn't live up to here's a list.
The developers said there would be large open world battles you could come across and join (Their aren't).
The trailers showed large forces amassing and meeting for battle in a field. it was purported to be game play (It wasn't)
They said the living world would be vibrant and varied. (I've come across the same NPC's over and over leading me to think there are about 5 males stock NPC's and about 3 female ones just wearing different hats. There is also nothing to really do in the open world as the side quests are few and mostly fetch quests)
The ultra realistic combat (Until you get a suit of armour and level up your strength and become the Terminator easily killing an enemy knight in seconds with no variation of moves)
Intelligent AI (Well yes the AI is super smart when it comes to catching you stealing, but no so smart when it comes to combat, walking and anything else).
Varied armours and weapons (Sure there are a few swords, but very few Axes, Maces, shields, no crossbows. Very few armour styles and only about 4 helmets.)
There are more but I simply can't remember them. I'm not saying it did what Fable did with its hype in which the developer straight up lied about what would be featured but they promised things they could never deliver to drum up hype.