Very true. Some keyboards have latency twice as bad as the round-trip ping time of a server you might be connecting to half-way across the country, which is...nuts. There really isn't any reason for a keyboard to take half of a tenth of a second to register a keypress.

RTINGs tests for latency, but I would caution folks to note that "high latency" to them is ~8 or 9ms, which as Dan's tests show, can be almost 10x better than some common keyboards out there.