Back in March, I made a poll about the most anticipated DW abilities (though it was only for gen 1-4 Pokémon), and both runaway winners, Ditto and Breloom, obtained theirs in BW2, along with other favorites like Lugia and Ho-Oh. So now it's time for a second take, now that the number of Pokémon without them is much lower, and gen 5 Pokémon started getting theirs! (Note that this factors in the fact that Gothitelle will be getting Shadow Tag next month, so if that fact makes you want Chandelure less it's something to think about.)
As for the previous poll on early Japanese releases, 165 voters out of 321 say they make them want the game even more, 67 say playing yourself is what really matters, 53 claim those releases somewhat dampen their anticipation, and 36 hate hate HATE being spoiled before the international release. Of course, it often depends on the game, but this was intended as a general question.