McGraw Hill's SmartMarket Report on BIM came out earlier this month and confirmed what many have been saying: that builders are really taking a lead in adoption - although that varies based on location and project/firm scale.
Last year's report said that the contractor tipping point for BIM adoption wouldn't happen until 2011 or so. This year is anticipating that it will happen next year.
There are some other great statistics included (something new for everyone's marketing departments to sink their teeth in...!), as well as case studies.
The report is available for free download here.