User blog comment:Mckrongs/Monster Hunter Frontier Season Forward 4/@comment-99.237.210.54-20120523051302/@comment-969093-20120523071040

Hitlag depends on the sharpness level + damage vulnerability of a monster's body part. It's not going to make any difference on a Gravios tummy unless the sharpness is at white of purple. :/

On monsters like Raths however, it might get in the way when hitting the head at A+ sharpness. Still, I couldn't tell from the video if the 2nd hit produces any additional hitlag. Technically it should but I can picture that not being the case too.