Hugo
Can you 'go fast' in an Airbus?
Only while falling out of the sky having lost control, failed to unload the wings, but decide to keep pulling back on the stick anyway.
So yes, you can go fast in a bus, just not in the way the cheese eating surrender monkeys envisaged.
As for the delays, you only have to listen on delivery for the constant and regular delays being advised to traffic bound for mainland ports. So until the Chinese Civil aviation dept manage to wrest more control of the airspace from the military control freaks, it's only going to get worse.
To blame HK ATC for this one is not particularly fair. Feel free to blame Norman whatshisface for the crap airport design perhaps. Compare CLK's layout with Kansai, never once had a delay asking for push back at Kansai with multiple push backs occurring in the close vicinity, and when ready to rumble, just pull out on to a parallel taxiway and go. What a simple and great design.
Just like CLK - said nobody ever!