As a long-torsoed, short-legged woman, I envy those whose proportions fall with a "normal" range because they get to experiment with so many different looks and proportions. And, Una, as for trying to figure out whether or not you have a long (or short) torso, I'd say if you have to measure to find out, you probably fall within the normal range.
How I know I have a long torso:
(1) Belted items ALWAYS encircle my rib cage instead of my waist. Removing belt loop is the first thing I do if I purchase an item with a belted waist. As for designs with inset waists, I'm speechless if I find one that even approximates where my waist is located.
(2) Low-rise jeans are a cruel joke unless I choose to expose at least half of my butt and nether regions to the world. My low-rise pants are everyone else's medium rise. I'm fascinated by pictures of Angie in her low-rise pants because I can't figure out how they stay up on her body.
(3) When I was told that, when I got older, I'd need a good bra to make sure that my bust lines up with the mid-section of my upper arm, I started laughing. Even sagging, my boobs would have to grow another 6-8" to reach my elbows--and I'm in a D cup!
(4) The 31" inseam legs that accompany my torso mean that I need to dress the lower half of my body quite carefully unless I want to spend my life in 6" heels. At sixty, with wonky knees, that isn't an option that I can contemplate. Wide-legged, baggy pants, midi skirts, cropped pants, colored tights, and contrasting footwear all come with a huge CAUTION--DANGER AHEAD sign. Even sales staff have been reduced to giggles when I try on these items, acknowledging that "maybe they just don't work"-- a massive understatement.
There are some things that I do enjoy about having a long torso. If I wanted to, I could still wear a bikini at 60+ as long as I kept up with my abdominal crunches. I don't have to worry about appearing large busted even in a D cup. Tunics and skinny-legged pants are my friend so I don't worry about surrendering my waist. And I rarely, even at 60, have to worry about skirts being too short.
In my dreams, I sometimes wish I was a long-legged creature with a short torso who could run around in ballet flats and floatly, longer skirts. But, for all of those who are wondering about their torso length, I figure that if you are outside of the "normal" range, you don't have to measure to know if you have a long (or short) torso. The mirror tells you every day.