Black Krim?

Most of the information I've located about the Black Krim variety claims it to be a plant of medium stature in the 4'to 6' range. I planted two purchased Black Krim seedlings to replace my seedlings which got frost bit this spring. The plants are already almost four feet tall and outpacing my Brandywine varieties which are usually the largest plants in my garden. If they are also heat resistant as reported my many and continue their growth through the heat of summer, they may exceed 10' in height. In your experience, is the Black Krim a medium height plant?

Ted