"Hold on. What about the work of Jason Watson and David Strayer who researched “supertaskers.” They studied 200 subjects in a controlled fashion, and determined that 2.5 percent could in fact drive a car in a difficult simulation while performing a complex set of cognitive tasks (so-called OSPAN tasks). Those researchers stated (see Supertaskers: Profiles In Extraordinary Multitasking Ability):
Supertaskers are not a statistical fluke. The single-task performance of supertaskers was in the top quartile, so the superior performance in dual-task conditions cannot be attributed to regression to the mean. However, it is important to note that being a supertasker is more than just being good at the individual tasks. While supertaskers performed well in single-task conditions, they excelled at multi-tasking.
This research is continuously overlooked, especially when someone comes up with some results that seem to confirm the conventional wisdom that a) multitasking is impossible, b) people are bad at task switching, and 3) it can’t be learned."
Via Howard Rheingold