very interesting thread. Believe it or not, but my actually first eye-opener to the concept of evolution was during a talk in my kingdomhall.
The brother, a bright guy with high education (studied at a time, when higher education was viewed a personal matter) explained basically, that evolution does indeed happen and is even observable. However, it is not a concept sufficient to explain the whole origin of things. I personally liked this approach, and I learned more from this talk than from the dozens of other mindless talks being given every weekend.
Hwoever, for many, this talk was too intellectual, and he was quit critisized for it.
Of course, the goal of the talk was to strenghten the beleif of a creator, but looking back, it was much closer to the real concept of evolution than the ussual JW reasoning.