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brain doesn't really matter. It does just not as much as they originally thought. Its really about the efficiency of the wired brain. They found that the most intelligent people have the fastest connections not the most
Thus suggests that you may be able to increase your brain performance or boost your intelligence via drugs. It also suggests that by speeding up ANN's (Artificial Neural Networks) may boost the intelligence of the system
In 2011 There were some studies done by Air Force researchers. They found that they could cut training time in half for air force pilots by delivering a mild electrical current (two milliamperes of direct current for 30 minutes).You can read the full article here
There are already a number of consumer products being created to try and take advantage of this discovery and its starting to hit the mainstream. Wired did an article on it "Inside the Strange New World of DIY Brain Stimulation". As well self described biohackers like Tim Ferriss and Dave Asprey are touting the positive effects it has had on them.
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You can check out foc.us here
You can check out Fisher wallace's product here
So I decided to buy one a year ago and test it on myself. I got a cheaper tDCS ApeX Type A