No, in this case the delay affects only projectiles that display a direction, like arrows or tridents, snowballs are not affected, also the method used to change the projectile's Motion does not influence the update delay, the only method that seems to update the arrow's displayed Motion correctly is TNT's explosions.
PALKIP
I checked, for some reason the player's FallDistance is 52% higher than expected
No, in this case the delay affects only projectiles that display a direction, like arrows or tridents, snowballs are not affected, also the method used to change the projectile's Motion does not influence the update delay, the only method that seems to update the arrow's displayed Motion correctly is TNT's explosions.