As discussed at http://forums.netbeans.org/topic42001.html I would favor the addition of this feature. @method documentations are not shown in autocompletion when entering 'Class_Name::'

Since @staticmethod is not defined in PHPDoc standards it would be a (much needed) individual add-on. While PHPDoc is no longer under active development and alternatives like DocBlox pop up it needs to be considered to add more PHP 5.3 features to the PHPDoc functionality of NetBeans.

@staticmethod should react on magic functions (__callstatic) but also overwrite inherited methods:

abstract class SingletonPrototype {
public static getInstance() {
...
}
}

/**
 * @staticmethod MySingleton getInstance()
 */
class MySingleton extends SingletonPrototype {
}

Currently it's not possible to access the methods of MySingleton through autocompletion because NetBeans reports the object to be a SingletonPrototype.
With the added @staticmethod it should report an instance of MySingleton with all it's further methods available.