Funny thing is that every person I know that owns a Nintendo system either also owns Demon Souls or Dark souls or both like me :)
Dark Souls is completely different from the generic third party game Nintendo players hate. And therefore it is successful with Nintendo owners.
The problem is that also everyone I know that owns a Nintendo system is a PC gamer because why buy inferior games when the PC version is better and cheaper? Thats also why I bought Demon Souls for PS3 (simply no other choice) and Dark Souls for PC (was just 10€ within first 6 months!)
All of the Nintendo people I know have a Nintendo system for Nintendo games and system exclusives.
If they have a PS3 they also just buy exclusives (99% just buy jrpgs) If they have a 360 they also just buy exclusives (first 2 years also had alot of jrpgs this and DeadOrAlive 4 were the reasons I bought a 360) everything else is bought on PC.
I have WiiU PS3 and 360 and 95% of every consoles library is system exclusive. I just have random third party games that I bought when I was able to get them used for like 3€ or so.
I also have 500 games on steam and and most of it is multiplatform games (with some PC exclusives)
Tomb Raider, Dark Souls, Sleeping Dogs, Borderlands 1+2, Hitman, Witcher2, Dishonored, Farcry3, Bioshock Trilogy, Mirrors Edge, Risen1+2, Skyrim, BatmanTrilogy, Assassisn Creed1-4, MaxPayne3, DeusEx, Darksiders1+2 etc etc etc.
I do have Darksiders 1, Enslaved, Metal Gear Rising and several other PC games on console but just because they were not initially released on PC (also bought GTA5 for PS3) but I always get angry when a console exclusive comes to PC because I feel like I wasted money on the console version.
(Gta5 is a different story tho because I bought it new for 15 bucks and will get at least 15 bucks for selling it when the PC version comes out and I will be more than happy to get rid of that 25fps mess.)