[varispeed]

There are keyboards with 1kHz polling.

[wholinator2]

Yes but it takes longer than that for the signal to reach the usb port. And i doubt if many of us are typing at 1000 keystrokes/second. Apparently that's around 12,000 words/minute assuming average word length of 5 characters.

[varispeed]

1ms latency is about what can be achieved with USB.