displayed wind/V on a flight deck and not in GA cockpits?

[PPRuNe Towers]

W/V derived from a mathematical process called Kalman Filtering - it must be a complex process as it introduces a 7 or 8 second lag in the EFIS/FMC displays. More meat in the link above.

Same method and hysteresis with ATC surface wind processing and reporting. If you really need to know instant W/V ask for 'spot wind.'

Rob