tanuki: Some doctoral students at my alma mater are doing fascinating research using Stroop and the MWCST, and have had some successing demonstrating a role for the hippocampus and the anterior cingulate in those tasks. Even though looking at success at those tasks as largely indicative of frontal lobe function is parsimonious, I don't think it tells the whole story.
And just like that, we're the most boring people on LSD (which is, itself, absolutely rife with boring people).
-Ty