Looking at the January stats is going to be a really flawed approach to this problem, not just because people are really bad at statistical analysis, but also because the January stats include some of the Tornadus Therian metagame. I find that abilities tend to have a huge role in the representation of some of the types in OU. Psychic, for example, has Alakazam, Reuniclus, Espeon, Deoxys, etc. Conversely, there are typings with less representation than one might expect because of the lack of specific traits in existing Pokemon. Flying, for example, was strongly represented by Tornadus Therian because of Regenerator and Hurricane, but a lot of Flying-types don't have Hurricane and/or are really bad. I've heard people referring to the Flying type as a "sleeper threat" before. Not that I think Flying is necessarily a good type for this, considering we already did Tomohawk and we've already seen Tornadus Therian. My point is merely that this is the kind of thing that we could be looking at. Something to keep in mind: While typing is certainly a very large factor in a Pokemon's viability, it's far from everything. Kyurem's formes are an excellent example of this. We can say that Dragon / Ice is a horrible typing all we want, but a comparison of Black Kyurem and White Kyurem makes it hard to justify using it as an excuse for Black Kyurem being solidly OU at this point, while a very similar alternate forme is Uber.