I know I am opening a topic where I may get skewed views on the topic. But i guess this is one of the basis for Bi. The Higher Management and most of the end users tend to have a good hand over Spreadsheets. And have to make the decisions at higher levels. Just as the famous saying 'The Devil lies in the DETAIL' when it comes to analysing the data at finer level and making the most of Bi from the data available data appropriate Bi tools are the best bets.
People who have been working in the Business Intelligence delivery area would strongly agree that Spreadsheets are good to an extent of MIS, and Reporting purpose but not really tend to deliver the most for analytical reporting which is the main objective of Bi.
It’s very common scenario; Inspite of the best analytical and Bi tools present in the organisations the end users make an effort to derive analytical information through spreadsheets which are really more suited for standalone reporting and aggregate reporting.
In short; If you want to derive the most from Business intelligence initiative. Bi tools have to be used considerably, the more you use the more value reaped from the Data available within the organisation.