The video is also deceptive because it freezes and doesn't start counting from the tap. It counts from referee contact...and the sub should be let go immediately upon feeling referee intervention...not a full a full second after.
The reality is he was full blast cranking a heel hook for a good 2 or more full seconds AFTER he felt the tap. Use other subs as reference. Most guys let go or ease off a bit and look at the ref before letting go. They don't feel the tap and keep full blast cranking after feeling the referee contact. Pettis let go before the ref even made contact. He felt a tap, he let go. It's not rocket science.
No love for Palhares. Damn shame because his leg locks were beautiful, but I'm not gonna love a high level boxer if he consistently lands late blows.