Just got this from MPC:

An exclusive boarding line with Cathay Pacific at Hong Kong International Airport
We listened to your feedback and understand that you would like to have more time to settle into your seat before your flight takes off. No matter which cabin you are travelling in, you can now enjoy a priority boarding line* exclusively for Diamond members whenever you travel with Cathay Pacific through Hong Kong International Airport. With less time queueing, we hope you have an even more enjoyable start to your journey.

Now if only they could do this at all the out ports too!