I met Colin once, years ago... this was even then well known, indeed. Even if you never met him, but just watched his interviews, this cannot possibly surprise you. Glad to see we basically don't give a rats ass anymore, at least about being gay.
His commentary OTOH is truly awful, I must agree, he is so twee and superficial and altogether uninformative. I could never figure this out, because I must tell you, Colin Jackson was respected as one of the most professional British T&F internationals of the late 80s and 90s. He trained like a demon and except for Barcelona 92, produced the goods in championship finals.