Do most brown tortoise shell cats or "torties" have tortitude?

I am no cat fancier, but this is what the vet said it was and it looks just like the picture in my cat book-I am sure it isn’t a pure bred.
I used be repulsed by any cat, and allergic to them. Then, this vagabond cat arrives at our doorstep out in the country, right after the death of another pet, showing signs of prolonged suffering; What’s weird, I am no longer acutely allergic to cats evidenced by my allergist. She, the cat, is keenly sensitive to emotions to the point of being almost mystical. I have read according to Scottish legend, if a tortie arrives in your village, it is a sign of good luck. I also hear they only reproduce females, which I find interesting. Do others share similar experiences with this cat type.