If I wanted faster input, I would be more interested in "as fast as possible" than the arbitrary and relatively slow repeat rate of 10 keys per second.
It's not necessarily about faster input, it's about input that can get past any input detection software; that might not be a concern for you in your situation but it is a concern for a wide swath of gamers. If you go straight to "as fast as possible" many games are going to snuff you pretty quickly.
And a good typist will complete the press of a keyboard key at around 120ms, and the press of a mouse button at around 100ms, so I would expect that the delay between keystrokes will be closer to 100ms than 1ms (which is actually 10-15ms due to OS granularity).