We know what most mean when they state they want "real-time" or "instantaneous" but put in perspective the wind speed at an instantaneous point in time is really zero, as for there to be wind speed the wind speed and wind run has to be measured over a period of time, similar with real-time, speed is based over a period of time in the past, similar with gust, it is measured over a period of time, it simply has to be.