In the originating Apocalypse-world, no :-) It is apocalypse after all, everything is really bad :D

But I have seen hacks/systems with critical success on 12, (or more than 12, if you have i.e. modifiers for your character stats).

But having critical failures sounds like fun, go for it :D

You could easily add it to i.e. World Of Dungeons [1] probably the shortest rule-set for RPG I have ever run :)

[1] http://www.onesevendesign.com/dw/world_of_dungeons_1979_bw.p...

I think he might be saying that, if you find you've rolled a (natural) 1 on 2d6, it might be time to worry about more than just your character! ;)