Here's an article on how to detect and measure the effect I'm talking about. http://www.pcworld.com/article/183928/how_to_find_and_fix_input_lag_in_your_HDTV_o

Here's an article on how to detect and measure the effect I'm talking about. http://www.pcworld.com/article/183928/how_to_find_and_fix_input_lag_in_your_HDTV_or_monitor.html http://www.pcworld.com/article/183928/how_to_find_and_fix_in... It's a consequence of using framebuffers in the display device. I mentioed Airport because it exaggerates the effect, but any digital display will likely introduce s little extra lag.