On primal gesture candidates

Please take a look at the Dinafon blog. I have posted my LabPhon abstract there. It deals with a constriction location bias between C and V, which I have found in the Brazilian Portuguese lexicon (oral and written), and brought out through careful statistical analysis of the co-occurrence frequencies.
Lo and behold, the lips, the tongue blade/tip and the tongue dorsum come out as the winners. These articulators take advantage of the fact that they are used in different ways to produce C's and V's, and tend to stay where they are. In other words, C and V tend to agree in constriction location well above chance level (effect size OK). The bias is of moderate strength, and, thus, leaves room for contradictory trends to effect more distinctiveness where necessary.
There is a long way to go to demonstrate that the trend is universal, but I guess this is feasible. If it comes out as a true probabilistic universal, here is one more reason to use simple gestures with the most popular articulators to simulate the language games of our ancestors.