Demographics

I've had this question in my head for months now... are 'demographics' dead. Most marketing and advertising planning looks at demographics such as 25 to 34 year olds, with $75,000 + household income that go to moves twice a month. While still very relevant, I feel that many marketers should go beyond the 'demos' and dig farther into behavioural and attitudinal traits of their potential customers. There will be select times where it will be more effective to target a group due to their behaviour than their demographic. These behaviours may transend demographics, and produce better results or ROI. More can be said or written about this, so I'll just leave this out there for people to think about and comment on.