Here's an interesting question, how much have load times changed since the introduction of these bars (I know they've been present for a while) including this new iteration? Wasn't it always one of the major points of concern for Google to provide users with the quickest possible experience ? If I recall they used to have it down to a science. I don't think such changes can be noticed by the human brain but one would think it has risen and it would be interesting to know if it makes a difference and if they've abandoned that thought process in favour of the social sphere.