how well Hillary Clinton did. I always thought that she was given a bit too much credit - but it is nice when that occasionally happens to a Democrat. All the same, most accounts credited her with being a good manager of the State Department and an excellent asset internationally for the US. Nothing has changed on that.
There is no reason that every evaluation of how Kerry is doing as Secretary of State has to make the comparison with how Clinton did. (This has gone both ways - including silly articles that knocked Kerry for going to Europe first - when Hillary went to Asia first.) I don't recall any such nonsense when Madeline Albright replaced Warren Christopher or Rice replaced Powell.
In fact, for those wanting a Democrat in 2016 (including Clinton), they should hope that Kerry does become the most successful Secretary of State since George Marshall. Running on Democratic domestic values, the recovery (I also hope that accelerates) and a clearly more peaceful world to which the Obama administration contributed - in both terms would be great. If that happens - and it won't be easy, John Kerry will easily be seen as an extraordinary Secretary of State - and that will take nothing away from the very likely next President of the US - Hillary Clinton.
At this point, it is too early to make those claims, but at this point I am very proud that I have supported John Kerry for President, for Senator (even though I was not in his state) and as a person who makes the world better.