Do you think that's why you might 'possibly' regard your whippet as a 'one off'?
Not being obtuse here, but I remember a lot of your posts about him, and to me, what you were describing about him, is what most whippets do.
I've been involved with whippets, greyhounds and lurchers for about 45 years, and owned four kc reg whippets, and seen several others, that worked like trojans, were afraid of no cover, however thick or dense and were braver than a lot of lurchers that I've seen or owned.
Not looking for an argument, just stating what I think. ?