That's not right - this setting;
B:"Add Biomes To Default World"=true
Causes BoP generation to occur on all worlds, not just default and BiomesOP. It's a limitation in minecraft that means this even needs to be in at all (it's a workaround, without it you'd need to generate the world, delete the chunks and then allow it to generate with BoP loaded). It's not picky about whether it's BiomesOP (though with that option off, it will only be possible to use the settings in BiomesOP), default or superflat. I know that's not what it seems like it should be doing from the wording of it, but check the code and see for yourself.
2000x2000 also isn't nearly far enough to guarantee finding a village on a even normal BoP map, though a lot of people do get lucky and find one or two by then. http://biomesoplenty.wikia.com/wiki/FAQs (it's a known complaint, something they're working on and there's even people in the comments on that page complaining that they've found 1 or 2 villages only - remember that's even with all BoP biome village spawning on - it's less common than that here).
