If we tried this in the UK with someone like, say, the late David Coleman, I'm not entirely sure anyone who remembers him would be able to distinguish - other than, as I said, the knowledge that he's been gone for quite some time now.

Coleman, was considered a go-to commentator for decades despite being gaffe-prone even at the best of times. He was occasionally oblivious and apparently lacking any self-awareness too. (He did kind of learn to laugh at himself though and was a good, well, sport, about it all.)

Sounds very AI to me. Come to think of it, he may even have been kept around precisely because of the entertainment value.

I assume that Al Michaels is not of this bizarre calibre and it wouldn't take long for people to notice.