No, I find this metagame very overcentralizing.
I'll use Smogon's December stats as my support. These are the 1337 stats: stats that are only taken from ladderers that have a rating of 1337 or higher. So basically, all the excellent battlers.
+ ---- + --------------- + ------ + ---------- +
| Rank | Pokemon | Usage | Percent |
+ ---- + --------------- + ------ + ----------- +
| 1 | Tyranitar | 7469 | 45.523% |
| 2 | Scizor | 6705 | 40.867% |
| 3 | Rotom-W | 6603 | 40.245% |
| 4 | Landorus | 5202 | 31.706% |
| 5 | Terrakion | 4802 | 29.268% |
| 6 | Dragonite | 4049 | 24.678% |
(table didn't turn out as pretty as I wanted, but I think it can still be read)
From laddering today, I can tell you that I've seen several teams that use just those 6 Pokemon (at any rating, not just at 1337+ rating). Landorus is on nearly 1/3rd of all teams, with Dragonite on 1/4th of them. That's not the worst though, because Tyranitar is on nearly 50% of them! Its not that Tyranitar is broken, its just really good. The Scizor-Rotom core still continues to dominate, and this shows that Sand is indeed the most dominant weather, with Politoed sitting at #10 and Ninetales at #34. Heck, Tyranitar is on nearly three times as many teams as Politoed. Finally, just going purely off the stats I posted: three Pokemon have more than 40% usage, which I find crazy.
Link to 1337 stats