Totally.
Because they don't know what quality is.
Same thing with people saying "FIRST!" on YouTube videos.
On topic: Length is still irrelavant though. Pacing is what matters and always will matter. Dishonored nails down the pacing really well in the start of the game and if it manages to balance it til the end, it will all be great. And like I've mentioned before, replayability is highly encouraged in the game and so is experimentation. Thief did that as well and look where it got to.
That wasn't what he was implying at all. And if you are not willing to experience great gameplay and the best games of all time because of graphics, then why even play games? Let us all make CG rendered cutscenes with a lot of cutscenes and some basic movement and call it a game.
Or because they *gasp* have a different opinion than you. Just because someone doesn't care for a game you do does not make them wrong and does not make your opinion superior to their in any way.
and just because a game has a bunch of cutscenes and doesn't offer choice does not make it any less of a game. Alan Wake for example. Choice? No. Linear? Definitely. Solid game? Absolutely. Just because a game is linear does not make it a bad game or inferior. Linear games have their advantages just like open games have theirs. In Alan Wake's case it may be linear but it delivers an experience that could not properly be delivered in a different medium and to try to force things like choice or open world into it would only serve to weaken the experience.
As said linear games have their advantages mainly in regards to pacing and story. Dishonored actually uses a bit of that to its advantage (the linear progression of levels). The downside to linear games though is that while they can deliver the better overall stories (due to the devs ability to maintain pacing and maintain controls over story based aspects) they lose the ability to allow different experiences from the same product.
On the other side of the fence non linear games have the advantage that they can provide differing experiences for everyone. But at a cost. An open game can't portray as a good an overall story as a linear game can because when you give the player that much freedom you lose the ability to maintain pacing (such as in a game where something bad is about to happen but the player is free to wander around and do sidequests for an hour). Or consistency (RDR is a good example of this. One moment you are doing a mission for Bonnie and by the end she is upset, then you immediately do another mission and suddenly she is instantly fine again).
Now I am not saying that open worlds and choice based games can't deliver a good story because they can. But the potential of the story can't reach the same level that a linear game can because of the aspects the developer loses control of.
In the end Open world/choice based games are not better than linear games and your preference for one or the other does not change that fact. They both have their strengths and weaknesses and different people will have different views depending on what they like more.
A gamer who likes strong narratives and expertly done pacing might like a game like Alan Wake but wouldn't like a game like Vanquish. Another gamer who prefers high adrenaline action isn't going to enjoy thief but they might instead enjoy Vanquish. Still another who likes Open world Sandbox games designed to run around causing mayhem likely wouldn't enjoy Thief, Alan Wake, or Vanquish but instead would prefer Saints Row: The Third.
None of these people are wrong and none of these peoples opinions are more important than the others.