I did not see this question here or I would have answered it earlier. I'm sorry for that.
Here are the two images in question:
(1) the "modern day representation"
(2) Freud's own diagram (from the Standard Edition of his works)
The problem with the "modern day representation" is that it represents the Super-Ego as being more conscious (or completely pre-conscious) than the Ego, and only the Ego to be "freefloating in all three levels". Freud perceived the Id to be completely unconscious, and the Ego and Super-Ego both to consist of unconscious, pre-conscious and conscious parts.
Since it is integral to the understanding of the structural model (id, ego, super-ego) how it relates to the topological model (conscious, preconscious and unconscious), the "modern day representation of their relation is simply false.
The related Wikipedia article explains the structural model quite well: http://en.wikipedia.org/wiki/Id,_ego_and_super-ego
I have often found, on many Stack Exchange sites, that the most upvoted or accepted answers aren't always the best, and in fact are often simply wrong. Since voters and askers are usually not experts, they often upvote or accept questions that feel or appear correct to them. As a user of these sites, I review all answers, even those that are downvoted or not accepted, and quite often I find the answer I prefer in one of the less upvoted answers, or by "reading between the answers", so to speak, and combining them all into one big reply.
I wouldn't worry too much about the relative number of votes. As we know from politics and the music charts, it is usually not the best who win ;-)
If you think my criticism is irrelevant to the main content of your answer, feel free to ignore it! Maybe your answer is better in other respects despite the minor fallacy of an inaccurate diagram. Maybe I am too pedantic. And even if your answer is not completely correct, it would be a shame if you deleted what could provide valuable additional insight. I think, we would do best to view this site as a community project, where we don't compete for the most upvoted answer, but try to cooperate to provide an answer that satisfies us all.