I'm nipping over from the JKR threads, his is a topic that has interested me for ages.
Must say,
this BBC article was one of the better ones, because it tries to be nuanced and makes the position that yes, there are chromosomal differences, but that what really matter is how the individual body responds to certain hormones. They also make a case that until there is more data on unfair advantages, it would be better to not have everyone compete under the assumed gender.
I acknowledge that it might even depend on the discipline and whether responding and having more testosterone is an advantage but tbh, I've yet to see someone who looks very feminine compete as a male in a discipline where strength is a key factor. It's only the other way round.
I'd even buy it that these athletes might not have known about DSDs for a long time and that they were raised a girls. Finding out must have come as a shock. But they still shouldn't have been allowed to compete.
There have been calls for a "mixed" competition. if that ever happens, I bet either nobody competes in it other than a few idealists, or it'd end up like the paralympics (or any disabled competition), where you have to have different "classes".