Yes, lets blame the gamers again. We the devs aren't at fault for making boring story lines, backed by half assed game play mechanics that get boring after a few hours and provide no variance. Not its the gamers because they all have A.D.H.D, have the attention span of ... ooh shiney.
As I have said before in regards to threads about stuff like this. My mind is VERY active, No I don't have a disorder I am just constantly looking at things and analyzing them. For example, last night whilst watching an anime called Tengen Toppa Gurren Lanngen I ended up inventing my own version of warhammer fantasy tabletop with hero sheets and everything in my head because bits got too slow to keep my interest.
Same goes for games, I played roughly 10-15 hours of the story in Screed Brohood having 100% the other stories (fuck finding the flags) before I got bored as I felt like I was playing 2 again. Very little changed.
FF13 held me for roughly 15 hours too, ain't gotten bored of it, I just don't play my xbox as much as I once did. Dead Rising 2 became really grindy really fast meaning I couldn't finish it in 1 play through but instead have to restart every 2nd day in game because I met some uber powerful enemy or came to the "get the bike on the train bit and fail 70 times" and raged at it.
Red Dead started dragging once I got into Mexico and felt a lot like GTA on a horse, EA MMA got boring as it just did, Oblivion became too "What do I do next? oh well that seems boring," Dragon Age 2 I got to the deep roads bit 2 days after having bought it on pre-release online then didnt touch it for 8 months, played the deep roads and again haven't touched it since.
But yeah the other 30 odd games I own I have 100% finished. so fuck you Kotaku!
EDIT:
Also adding that I completed Reach on Legendary (which took roughly 4 days hardcore playing as I am not a halo player by nature) and Smack ops on Veteran (which took roughly 4 days of ARGH ACTIVISION FUCKING SUCK! rage) and Gears 1 and 2 on Hardcore.
Also, Played about 60% of FO:NV story and lost interest as well, became too boring.