Kalliope, that was the post I saw last night as well, which was why I said the original patch note was vague. I really would like to see it officially spelled out in a blue forum post at some point (I don't check battlenet so if that has happened there, then I haven't seen it). And if that is the case, then I don't think it's a bad thing. While I wouldn't mind the option of a color stable Worg Pup, for example, it was a color changer for so long, I'd probably just leave it that way too.
I wouldn't even mind some color changers in the wild as long as was specific feature of that pet. Like if they had a "rainbow moth" or a "chameleon lizard," something like that, where the implication is that it will always change colors.
I think those of us who like collecting pet skins get a little panicky because we do things like spend 8 hours trying to get things like a rare gold-colored Gold Beetle, and our nerves are frazzled.
But now that I think about it, it would make sense that this shouldn't affect wild caught pets because they'd JUST made them stable (mostly) in the last patch, so it would make no sense to suddenly reverse that.