Personally, I think there is a big improvement in recycling here. You might not 'see' the change but you can definitely feel it, through the attitude of the people. People actually understand the need for recycling: decline in resource, global warming, etc. but it's a matter of putting it into everyday's practice.
Corps in HK are doing their part in campaigning for recycling / go-green although they often seem to be ineffective PR gimmicks (No straw and lids day at McD's; no plastic bags day at 7-11). Sometimes, I think if they cut down on the leaflets hand-out they will be saving the planet more effectively...
Nevertheless, people in HK are becoming greener and more recycling actions will be taken by communties, especially the younger generations.