Point well made. But I rather see efficiency in airport terminals immediately as compared to aeroplane speeds, at least right now. For international flights it'

Point well made. But I rather see efficiency in airport terminals immediately as compared to aeroplane speeds, at least right now. For international flights it's a norm to arrive ~1-2 hrs earlier. Sometimes this time is nearly 20-30% of the entire flight time and in some extreme cases, may be even more.