I did find something interesting on Books Online regarding CHECKDB : Just wanted to note here >

"databases that are created on SQL Server 2005 and later should never contain incorrect counts; however, databases that are upgraded to SQL Server 2005 and later might. "

Wow, another fine detail to memorize 🙂

http://msdn.microsoft.com/en-us/library/ms176064(v=sql.105).aspx