Quote from K1ngFiasco >> Haven't tried it in 20, but that move used to be done by tapping the left trigger. Causes your guy to hesitate just a bit. 

Edit: he maybe just stopped pushing forward on the stick....gonna have to mess with that as it looks useful

 Yeah if you hold LT too long the guy stutters and that messes up your momentum, so hes either just stopping altogether or doing some sort of hesitation