I agree they do provide support too. I would say even more then Polo Wraps but that is just my opinion. I can also say that I can tell the difference in performance in some of my horses with and with out SMB boots.
Also I would think ANY study done before 2008-2009 would be obsolet as they have changed their boots several times over the past few years. They started out with the SMB then they came out with the SMB II which they had for a long long time then the Elite and about the same time the SMB III. They also offer a combo boot however I have never really liked them very much. I also have a set of their skid boots but do not use them very much and opt for for the Leathe Skid boots.