This is an interesting point and something worth digging around for (the answer). Though the "super users" may know the difference between this and that, the a

This is an interesting point and something worth digging around for (the answer). Though the "super users" may know the difference between this and that, the average user, and even above average user may not. The "reasonable expectation" of an average user might be that turning off web history would cause Google to stop tracking.