I think you're overestimating the impact Destiny will have on the One. Now, the One will definitely see a good boost (probably will sell ~250K+), but nothing that would qualify as huge. Especially once we see it in comparison to the PS4 boost.
Since the game free bundle on the 7th XBO has been doing outstanding, at least on amazon. over 100% increases on multiple sku's as well as software boosts raising over 50%. THis is just amazon of course but id expect other retailers to be very similar. Ps4 will obviously sell more, not even a question about that, but XBO will also see a pretty significant boost in september.