Model driven architectures and BI - a perfect pairing

In this article on +TDWI by Bob Potter he explains how divorcing the business logic from the underlying platform as it then enables accelerated BI use.

I have to agree with him - I've seen reporting where complicated logic is implemented in the building of data marts at the database level.  It should be easier with the increased sophistication of BI tools, to leave the data untouched and put any business logic in the BI tool.  This should mean that the data is left to IT and the business logic is left to the business people (where it should be).