Actually that isn't true, Genesect is more used. You guys aren't distinguishing between the 3-month statistics versus the September "alone" statistics. Considering that part of the 3 month statistics didn't include Genesect, I am impressed. Right now in the most relevant meta and includes a "whole amount of Genesect usage" with "a whole amount of Scizor usage", which is the September stats, Genesect is used more than Scizor by 1.6%!!! It only displays two places, but to put in perspective the difference: it is the same difference of the usage of Jellicent and Mamoswine.
I honestly think that the distorted OU stats stem from a large amount of inexperienced PS! players. It may be I just be in contact with lower ladder players more because of PS! strange mechanics, but the OU metagame I think BW2 as is incredibly different from the one displayed in the statistics. For example, Gliscor has high usage, it is in the top ten. However, the demands of the BW metagame, such as the plethora fighting-types, very huge amount of Terrakion usage, and sand being the dominant weather is not there anymore. As a matter of fact, many of the Pokemon that Gliscor could check now have ways to work around it such as Breloom, Conkeldurr, and "more efficent" special Landorus-I. You really don't see that often. Infernape has a high amount of usage in a rain dominanted metagame and again you don't see that often! The suspect ladder kinda gives some insight, but I would like to see the return of 1337 stats (maybe >1650 on PO?).
The only way rain could have such high usage with its primary abusers being lower on the stats is rainstall, which is definitely not the case.
edit:
Having the ability to counter a huge amount of threats in one slot in a metagame with the most diverse threats is very valuable. Spike-stacking teams aren't limited to Deoxys-D, Ferrothorn is the best supplier of Spikes in the game (it can be universally placed on almost any team) and it shows this through its usage.
