Interesting... I know nothing about drunken boxing, it's interesting to hear it described as an advanced/adjunct, deceptive form of other systems.
I've been told a similar interpretation regarding the HtH fighting style of Gyokyushin ryu ninjutsu. Gyokushin ryu uses body mechanics very similar to it's parent tradition Gyokko ryu kosshijutsu (which is very Chinese) but in whacked out and deceptive ways that could look like "drunken boxing."
There is some speculation that Gyokushin ryu is a synthesis of sorts by the Toda family and perhaps Takamatsu himself, based on old strategies and philosophies now entitled ninjutsu/ninpo. Takamatsu spent extensive periods on the mainland and supposedly mastered many fighting systems from there... I wonder if he borrowed some of these concepts (of drunken boxing) and applied them to Gyokko ryu, giving a fittingly deceptive style of fighting to this ninjutsu "ryu."
A little tangent, sorry if it is innappropriate
