I think that Dallas has fared much better than other cities in that the housing prices have always been relatively low compared to other metropolitan areas of similar size. Prior to the crash, prices were rising but no where to the extremes as was seen in other areas of the country, particularly the coasts and Vegas.
I sold my house recently in Plano for $5k less than I would've sold it for a a few years ago and then I bought my current house in Murphy at a similar price reduction. That doesn't seem like too big a drop, but that's just one person's experience.