Forgot which anko this is from and didn't completely understand the theory mentioned in it.
The author had an idea about Dosu yukkuri's intelligence. The experienced abyuser said that seeing a cross section from a Dosu and a normal Marisa, the proportion of Skin-Paste-Core is actually the same on immature Dosu (the more stupid kind). This made the Dosu's intelligence and mentality not much different from normal Marisa.
The concept also explained how house yu (with smaller core) actually have similar intelligence to normal yukkuri instead of being even more retard because of the small volume.
Another point is that for the reason, bodied yukkuri (with higher paste-to-core ratio) are more dangerous because they're smart. Fortunately because they're smart, they usually know to get along with human instead of looking for trouble (except the offshot scums).
So... instead of paste core size, he suggested that it's the proportion of paste core to paste that's affecting their ability to store knowledge, and that practical intelligence itself is like human, depend on how yukkuri would use that potential.
Another even less explored (if at all) concept: mitosis.
One name came to mind... Remirya-aki's Reimu. :D
But his are usually more for the lulz than abyuse or seriousness :D