I believe he was referring to some newer V6's that make roughly the same power we do. They require premium fuel with only marginally better fuel economy. They also lack ~50 ft-lbs in the midrange. Consider the G35 with it's 306hp V6 engine; only 268 ft-lbs (vs 320), 17/24 fuel economy vs 15/23, both with 5 speed auto.
Currently premium gas + V6 is about equal cost to regular gas + V8.