Keep at it. The punch looked nice and quick. Just not the fastest I've ever seen. A lot of mother****ers have strapped the gloves on over the years and some of them had impossible speed. Look at Zab Judah as a more recent example.
You don't get any body turn in that punch. It is not an upper body punch- the mechanics start at the floor. You have to turn your hips, then your shoulders and that gets your head out of the way of counters.
There's not One way to throw a punch. I intentionally threw it like that to get faster retraction since Body shots leave you more exposed.
Im getting old and lowered mobility in My hips and upperbody. By cutting down on rotations I can move in and out quicker. Im also advanced and have more efficient movement that compensate for bending the rules