PHPDoc isn't necessary for overriding functions, as it's naturally inherited from the parent. Duplicating this text down through the class hierarchy simply makes document maintenance unnecessarily complex.

My IDE at least can pull out the PHPDoc where necessary, see below:

![image](https://f.cloud.github.com/assets/936064/335709/5e00c08a-9c94-11e2-9ecb-7bdaf74b8a7a.png)