http://www.youtube.com/watch?v=WhvvNGeHHME
The only way a BM hunter would beat an SV hunter would be during the duration of a 5x worm stampede burrow AoE, which is, obviously, not sustainable. Burrow attack isn't even really that substantial of an increase over just regular beast cleave, last I checked. And froststorm breath is
still a cone attack, so it remains highly unreliable as the direction your pet faces in relation to the positioning of an AoE pack is largely out of your control.
With the recent SS buff, SV just outclasses BM AoE even further.