Originally Posted by Fat Pocket
Not to mention Genesect's U-turn actually HURTS, given its 120 base Attack plus STAB and possibly a Download Attack boost. This pales in comparison to Tornadus-T's puny non-STAB U-turn coming off from a 100 base Atk - a pittance indeed. You can afford to spam U-turn with Genesect and be rest assured that you're wearing down the opponent fast, but the same thing cannot be said about Tornadus-T, who will be taking LO recoil as it U-turns out, and heavy SR damage as it comes back in. If the Tornadus-T player uses U-turn only for the opponent to keep his Pokemon (say a Terrakion) in, Tornadus-T player will be left in an awkward position. If the opponent finishes off a Terrakion (which would survive a Hurricane / Superpower at full-health lol), then the opponent can simply bring in their Tornadus-T's check / counter and force Torn-T player in the defensive. Nothing here screams Torn-T player having a drastic advantage over the opponent. Tornadus-T cannot afford to brainlessly spam U-turn / Hurricane the way Genesect can spam U-turn and get away with it.
Not to mention Genesect works in ANY PLAYSTYLE, be it Rain, Sun, Sand, or weatherless. No matter how dominant Rain is in the current meta, Tornadus-T will never be as omnipotently useful as Genesect.
Let's stop treating Tornadus-T like Genesect, and treat it more as a slightly better Tornadus-I, because that's a much more accurate representation of this Pokemon.
In the end, Tornadus-T is not an Uber - its Speed, STAB Hurricane, Regenerator, and U-turn are attributes that are perfectly manageable in OU. RP Landorus, Terrakion, the copious number of dragons, Thundurus-T, and Keldeo are much more threatening threats than Tornadus-T.
In the situation of Tornadus-T revenge killing the Terrakion, Weavile is the only check that has a chance of beating Tornadus-T. And that's only if SR is down. However, if a counter was brought in, Tornadus-T can switch out with U-Turn, giving the Tornadus-T player the momentum.
I doubt anything in OU will ever be a overpowering as Genesect was, Genesect isn't setting the uber benchmark. I also think you're underestimating Tornadus-T a little, as it is much more threatening than Keldeo (has counters for each set), Thundurus-T (not quite fast enough to use that magnificent special attack), and most of the dragons (there are more resistors to Outrage and Draco Meteor than there are to Hurricane).