My intent was more that it is straightforward to be aware of several of the most blatant leakages. Combating dialect analysis is a lot tougher, but the quiz likely used 25 of the highest value differences (many of the choices are laser specific: http://www4.uwm.edu/FLL/linguistics/dialect/maps.html ).
Context also matters a lot. If there is no obvious path to an IP or browser interaction, all that stuff goes away.
What would be interesting is a look into passive elicitation of information. Its easy to falsify something when you know someone is looking to use a single data-point against you. But tryly powerful social engineering would manipulate your confidence, and extract high-information-content data passively (when you are not expecting it), and to do this they need to instill confidence that you <are not being ovserved or monitored>. Yet they still may need to promt information flow, to feed the analysis. Which is sort of the art of interviewing, but now in a bit more 21st century context.
Context also matters a lot. If there is no obvious path to an IP or browser interaction, all that stuff goes away.