New to forum, 3s throw question

Hi everyone, new to the forum
3rd Strike is my main game. Have loved it since seeing the daigo parry, so much so i got a tattoo of ken parrying chun li after completing the trial on 3s OE but im having a seemingly simple problem:
How do you speed up neutral throws? (not holding forward or back when throwing)

I’ve searched google and SRK forum search feature but cant find anything. Best example is the first round of the first match in this video:

Apologies if i have posted in the wrong forum or broken a rule by posting a youtube link
Any help much appreciated