Tenseness and laxness of consonants in English are established phonetic concepts, with "fortis" referring to tense consonants and "lenis" to lax consonants. The discussion suggests that the perception of these consonants may vary based on individual pronunciation, but the distinction exists in the language. For those interested in improving their English pronunciation, listening to skilled speakers like Christopher Hitchens and Richard Dawkins is recommended. However, the thread highlights that inquiries about linguistics may be better suited for dedicated language forums rather than physics discussions.