It's a disingenuous title. The article is cool, but not what I was lead to believe.
The more accurate title would be "Software developer reads at 450WPM". Still interesting enough to get people to click to find out how, but "development at 450wpm" really really does sound like he's typing at 450wpm.
Reading code is not "software development", and reading is all he does at 450wpm.
A professional typist is somewhere around 80wpm, and a stenographer can reach up to 250wpm. 450 would have to represent an enormous innovation in typing methods.
Frankly, even if you could, 450wpm would be an irresponsible speed to code at. As mediocre as my own typing speed is, it's never the limiting factor when I code. There's just too much to consider.