If you're trying to record verbatim what someone is saying, you could easily have to type much, much faster than that.
Stenographers are often required to type at least a hundred WPM faster than you type, and some people speak even faster than that. The demands are even higher when more than one person is talking at the same time and you're trying to record them both.
There are some tricks one could use to speed up plain old QWERTY, however. In particular, you could use macros. That's essentially what stenographers use on their special steno keyboards. A single chord will translate in to a full sentence. Likewise, you could trigger a macro on a QWERTY keyboard with a single chord and that can boost your WPM significantly, if you use a lot of them.