Separate from the obvious more popular question of distance is how we "practice"...it isn't "training" unless there is someone to critique and correct your practice.That brings also into question at what distances we train. I normally train at 12-15yds. Occassionally I'll do some work at 25yds. I have shot at 50-100yds with my pistol "just for fun" but I'm not that good at it. Less than 50% hit ratio, and its not fast by any means.
I teach/learn a technique usually between 5-7 yards.
Once I feel comfortable with it, I'll practice it at 20-25 yards. I don't practice at a slowed down pace to allow for the increased distance, but at the same pace I would shoot it at 7-10 yards. Becoming proficient at the longer distance, makes closer shots much easier when presented.
I do slow down a bit, allowing the front blade to settle in the notch, when practicing out beyond 40 yards if I want all my rounds withing an 8" circle... you can win a lot of beer money shooting at 50 yards with a 2" J-frame; but it does take a bit of practice