After only 5 hours searching the internet ....

The most remarkable result of the experiment emerged when Small repeatd the tests six days later.  In the interim, the novices had agreed to spend an hour a day online, searching the Internet.  The new scans revealed that their brain activity had changed dramatically; it now resembled that of the veteran surfers. "Five hours on the Internet and the naive subjects had already rewired their brains."  source:  Wired, June, 2010