Originally Posted by .38 super
Pistol bullets does not need much stabilization compared to rifle bullets where the center of gravity is close to the tail of the bullet rather than the front part... On the other hand the faster the bullets spins, the better penetration is...
That is the interesting bit in the article though. It shows what happens to bullets spinning with a faster twist rate AFTER they penetrate the barrier. He also tells how slow motion cameras have revealed bullets doing much more than they should be doing during regular flight, when the twist is too slow.
He says that, based on new evidence, many manufacturers in the industry are changing their minds about what you stated in your post, and going with a faster twist rate for pistol bullets.