From my own observations and practice, I would say that what distinguishes a loose for maximising distance from one that maximises accuracy is a fast tempo and a more dynamic action through the extension and loose.
Shooting for accuracy there is a benefit in producing the same cast every time, making the shot more predictable.
Here there is a likely advantage in the tempo being consistent with the extension and loose measured.
For greatest distance it is probably advantageous to have a faster tempo and a fluent uninterrupted extension.
But both methods benefit from a clean and fluent in-line active loose.
When the final extension is seamlessly co-ordinated with a pushing of the bow, a more dynamic loose is attainable, but it is still important to have a clean non-disruptive loose.
Good awareness of shaft length and feeling for the head coming to the hand, control of length and loose is necessary to avoid self linflicted injury with the more fluid style of draw and loose when drawing to the head.
The more common factors in getting poorer distance might be less than full extension in the line of force, a disruptive loose causing untidy arrow departure, a slower tempo and inappropriate balance in a shaft of a given weight and excessive fletch size.
If the draw weight has not pulled the relaxed wrist into the line of force at full draw, the bow is significantly under drawn.
We will see some folks at full draw with wrist bent and elbow cocked up, sometimes stopping briefly at anchor and letting the fingers go forward.
This obviously gives up drawlength and cast due to not extending fully and not maintaining rearward extension through the loose.
The stronger shooters can be observed pushing into the bow as they come into the loose.
Jumping is I think a reaction to this with the heavy draw weights and can be disadvantageous if it involves throwing the bow out of line during the departure of the arrow, such as by casting the arm out of line during the loose or by deliberately jumping in anticipation of the loose.
In terms of practice, I think the first prerequisite is to attain full extension with a direct line of force and a clean active loose that does not disrupt the flight of the arrow.
Then and only then should one work on increasing the tempo and perfecting the co-ordination of pushing into the loose. If full extension is not made and a clean active loose obtained, there will be no advantage in the latter.
Rod.