Its an interesting theory, but everyone seems to be forgeting just how long ago the Chalich were exterminated. I would have to check the encyclpidia to get the exact numbers but it was a very, very,very,very long time ago.
I would think that in that time any Chalich that did escape (and I once thought that a few must have for some reason I cant remember) would have risen again to challenge the trow.
So, if the Chalich still do exsist, they live somewere off map. Maybe in the untaimed lands? However there is no direct evidence to support such an idea.
Still is fun the think about though.
Drunken Ghol