You can only really hit 100-120 wpm in bursts, and since programming is so mind dominated, it doesn't give you much of an advantage as someone who can burst at 20-40 wpm (reason why programmers don't list typing speed on cv's). Autocomplete doesn't improve burst typing speed that much since most people can type faster than the interrupted rhythm of a completion. Rather it improves API recall discovery times that are more thought intensive.