If you participate in the Customer Involvement Program (CIP), specific information about how you use AutoCAD is forwarded to Autodesk. This information includes what features you use the most, problems that you encounter, and other information helpful to the future direction of the product.
Learn more about CIP and see a sample report: http://www.autodesk.com/cip
Read the Autodesk Privacy Statement: http://www.autodesk.com/cipprivacy