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He's not really talking about "refresh rate"....here ya go http://www.behardware.com/articles/641-1/1rst-lcd-at-100-hz-the-end-of-afterglow.htmlsince nobody has answered, here you go:
http://en.wikipedia.org/wiki/Refresh_rate
and here:
http://www.necdisplay.com/support/css/monitortechguide/index04.htm