It means they didn't use the word, "freedom" on their home page. OpenBSD people care about and talk about freedom, I assure you. They have a track record of ejecting software with insufficiently free licenses from inclusion their project.
FreeBSD has switched to Clang because, among other reasons, they consider it freer. You and RMS may not agree that that it is indeed freer, but it is obnoxious and demonstrably untrue to say they, "don't talk about freedom".