I've tried testing this by slotting WB and Biting Jabs. I'd start off gaining the Empower buff after WB and then follow up with Jabs only to see that I'm still Empowered after the Jabs.
Am I just doing something wrong or does Empower not affect Biting Jabs at all? The reason I ask is because I keep hearing from different people that Empower DOES affect the Jabs but I'm just not seeing it.