There are a few posts which make me wonder if users google first before asking questions on StackOverflow. They seem to let other people do the dirty work of filtering the thousands of pages of results the search engine returns.
On the other hand, if the community wants to grow large enough so it will come on top of a lot of google queries, it needs to host redundent content already available elsewhere.
When I was relying on experts-exchange, question points were worth real dollars so I would search by myself for days before asking. Why should I now bother searching more than say, 5 minutes before asking?