My phone interview with Google had something I would probably describe as a brain teaser (which is probably why I didn't get a follow up interview). It was something along the lines of explaining how an insect in a bottle could jump out if the bottle was frictionless. Something like that. Anyway, I don't remember specifics well enough to make a strong statement, but I would argue that this isn't an absolute in either direction -- I bet a certain class of question is used less, but some that border on brainteaser are still used.