Maybe they're average typing speeds are faster than the average person's but typing fast and hacking (or programming for that matter) is just like math for medical doctors. Medical doctors know high-level maths much better than the average person but they're not exactly mathematicians. They're main thing is how well they can study more than how well they can do math.
Similarly, programmers, software engineers, computer scientists, and hackers don't need to be the fastest typers in the world, they just need to be good problem solvers. If you want to become a hacker then study some network programming - not web development. Get into physics and calculus as well before you graduate high school. Go through college, get a B.S. in computer science, focus on networking, and get out into the workforce and do some network programming where they'll likely pay you 80k a year - as opposed to the web developer's measly 30k annual salary.