http://www.minecraftforum.net/forums/mapping-and-modding/minecraft-mods/2524489-realistic-terrain-generation-rtg-realistic-biomes?comment=3610

I thought I had posed this question here, but I guess it must have been on Discord or MCF, so I will pose it here now for posterity:

Since when does Minecraft water have a salinity property that would allow for any kind of differentiation in generation?