Actually read the abstract for the article and it says that caffeine does not benefit or increase mental alertness or performance but it does increase motor performance. So the net effect is that caffeine drinkers who have consumed caffeine on a given day will not have higher mental alertness or performance to non-caffeine drinkers but they will have increased motor performance.

Golly gee willakers Batman! Is this the end of Playstation? Cmon you gotta be kidding me, how long ago did the Playstation 3 launch? Show me an article in one year that has the same subject and I will begin to take you seriously.