No, pilchute, I don't think he means what you think it means.
My experience on entering HK on the GD is that, yes, it does show that you entered and left, but it takes some time (days/weeks?) for the data to show up. That's because the GDs are manually marked off. I'm sure this process will get quicker as time goes by and the electronic data from the airlines enters the .gov system more efficiently (for them).