9. The system of claim 8 further comprising dynamically selecting a user scenario based on the aggregate observed user behavior, wherein the user scenario comprises a plurality of linked content pages and the aggregate observed user behavior comprises a percentage of users that reached the end of the user scenario.
9. The system of claim 8 further comprising dynamically selecting a user scenario based on the aggregate observed user behavior, wherein the user scenario comprises a plurality of linked content pages and the aggregate observed user behavior comprises a percentage of users that reached the end of the user scenario. 11. The system of claim 9 wherein the aggregate observed user behavior comprises the percentage of users that reached the end of the user scenario within a certain number of steps.