This invention includes a system for the association of a user of an electronic system with a demographic, wherein a data characteristic of the user is accessed and compared to a wide population probability distribution reference indicative of a demographic associated with the data characteristic, and making a determination of a probability that the user is up to the demographic based on the comparing. Systems may include a method for selecting a more probable data characteristic upon which to associate a user with a demographic, and a data processing apparatus configured with one or more wide population probability distribution references for use on any one of a number of electronic systems.