Infercatty can't be THAT threatening to the metagame. I mean, ScizorGross took 2nd at Nats... Scizor is weak to fire and thus OHKO'd, Metagross DX prolly can't do its quick 70 damage since Infernape never has 2 (Or more I guess) energy attached to it unless it's Lv. X, any techs like Metagross d and Metagross EX are also OHKO'd by Infernape, and any OHKO techs are probably OHKO'd by Infernape (Mew EX HP, Groudon EX, Latias EX d, Lati@s*, etc)
Infercatty is so popular right now but I bet it's gonna die out next format for three reasons: 1.) No Holon Engine 2.) Other more broken things will come out making Infercatty look like ChimpKitty 3.) Less EXs around, meaning the Prize to Prize ratio will be harder to deal with considering its overpowering damage.