I had a lot of new insights into this that the original post does not reflect. I'll repost after I edit it.

Are multitaskers really worse at multitasking than those who don't multitask? If you read the popular media accounts of the new study out in the Proceedings of the National Academy of Sciences by Eyal Ophir, Clifford Nass, and Anthony D. Wagner, "Cognitive Controi in Media Multitaskers," you would believe this to be the case. Now, go back and read the scientific study itself. The results are far less clear than the headlines. Multitasking may make you worse at taking attentional tests. But, hey! I'm a blogger. I know you multitasking, media-stacking, netsurfing, always-on readers lose attention quickly. Does that make you worse at multitasking--or better?