Medium and faster twist barrels are pre-civil war technology.
It would be hard to find a statement less accurate.
I don't know where you get this 'stuff', I won't call it 'information' because it isn't.
Common 16th and 17th century twists were 1:48; 1:66; 1:72 and many variations in that range.
Don't take my word for it. Take a trip to the G.M. Davis gun museum in Claremore, Oklahoma and look at their vast collection. Each gun is labeled with pertinent information, including barrel twist. With your own eyeballs looking at original guns you can verify what is real and what is not for yourself.
I don't want to get into an argument. Others may PM me with questions about traditional muzzle loading rifles. I'll be glad to lend some of my nearly half-century experience and help you.