One way to give an answer to this question is to check the number of web pages that have been indexed by Google. Here shows you how and what I get.

Take the Hong Kong Polytechnic University as an example, I first go to google.com.hk and input “info:polyu.edu.hk“. Then I follow the link saying “find web pages from the site polyu.edu.hk”. Finally, I get the result saying “about 502,000 from polyu.edu.hk”.

Here comes the result:

1. University of Hong Kong: about 2,790,000 from hku.hk
2. Chinese University of Hong Kong: about 2,460,000 from cuhk.edu.hk
3. Hong Kong University of Science and Technology: about 1,000,000 from ust.hk
4. City University of Hong Kong: about 887,000 from cityu.edu.hk
5. Hong Kong Baptist University: about 592,000 from hkbu.edu.hk
6. The Hong Kong Polytechnic University: about 502,000 from polyu.edu.hk
7. Lingnan University: about 160,000 from ln.edu.hk
8. The Open University of Hong Kong: about 151,000 from ouhk.edu.hk

These results are done on January 27, 2006. They may be different later or if data was collected from other Google servers. However, I think the figures and the rankings should be very similar.