Yes i agree, seems NPCs are like "eh a drow, ok no biggie." lol.
They sometimes seems more like "oh my another drow .... soooooo original" -_-
I remember they were reacting on my Lolthsworn drow in patch 6 ...
Maybe Seladine is the problem?
But personaly i think there should be some reaction for Half-Drow aswell ... at least here where the soldier is broken with grief over her dead friend. :-/
Sadly game only recognize half-elves ... nothing deeper.