Saiichi, the animation time of the bird seems redundant IMHO as i have seen my GF's autoblitz hunter have her bird hovering around the enemy doing 2-3 autoblitz (at 890 damage each) before returning to her.
and she's doing it with 60 total luk mind you...
so i think it's really all about how lucky you are to have the falcon proc... and yes as i said in my previous post, having some dex is still nice (especially because it also gives ~1/3 Aspd compared to agi)...