David Strayer is a Professor at the University of Utah and runs their Applied Cognition Lab.
Over the past decade, he has been studying driver distraction to better understand how and why people can become overloaded when multi-tasking. He uses sophisticated equipment, including driving simulators, eye trackers, and also measures brain activity (electroencephalography) and neuroimaging technology (functional magnetic resonance imaging) to understand the cognitive neuroscience of driver distraction.
During one of these studies, he discovered that while most people 'totally suck' at driving whilst on a mobile phone, a very small percentage performed just as well and some even did better. He believes that these types are genetically different in the way their brains process information. David calls them super-taskers, and approximately 2.5% of those he studied were able to do two things at once without suffering on either task. His current research also uses neuroimaging to show how people multi-task.
If you would like to learn more about super-taskers, visit the following sites: