Here's another review of the literature that raises serious questions about the conventional wisdom around generational differences. According to Thomas Reeves and Eujong Oh, "Generational differences are the subject of much popular speculation but relatively little substantive research. Among the speculations are suggestions that instructional designers should take generational differences into account when developing instruction and that games and simulations will be more effective learning environments with today's younger generation than they have been with earlier ones...Most of the popular literature on the subject...appears to rest on limited data, almost always conducted by survey methods characterized by a lack of reliability and validity data."
Read the full chapter from the Handbook of Research on Educational Communications and Technology (2007), edited by J. Michael Spector, M. David Merrill, Jeroen van Merrienboer, Marcy P. Driscoll.
Thanks to Norm Friesen for drawing my attention to this.