I wouldn't agree, I've dated quite a few in such cities that were educated abroad or are musicians, artists etc...

It often depends upon how and where you meet these women. Some of the migrant workers are indeed likely to possess the personality traits that you mentioned.

I find the crazy 'Fu Er Dai' girls to be a good laugh, but they aren't exactly wife material unless so you're so broke that you plan to marry them for money. Which is quite possibly the worst reason ever to get married. Plenty of idiot laowais do that though and then they wonder why they wake up every morning with the constant fear that their nob may have been chopped off; once that honeymoon period ends and she's finally shown what a mentally unstable pyscho she really is.

Then again, the mental ones are often good in bed. Can't win, can you?