What you've heard is true.
I'll defer to Jeanne, as she's stuck with breeding purebreds for a long time, but the last few years, we swung back to the Simmental side, concentrating on blaze/baldy bulls. Had several baldy cows in the herd that were 50% or higher SM... full white faces like traditional Simmentals, but bred to blaze-faced black bulls, over half the time we got solid color calves, and even some that got white had only small patches or even just a few white hairs...had one we named Lashley, cuz she had white eyelashes, but no other white anywhere.