For a short while it was, because he panicked that you somehow got his DAZ model (or whatever the technical explanation is), so therefore it must be public and now everyone will be able to do whatever he wants with Rebecca (which is ridiculous considering he's not doing anything with her himself).
After it was explained that you created the model from scratch as a fanart and you just shared an image and not any actual model files, he calmed down. But his initial message did make it seem as if he's blaming me for leaking Rebecca, which was a bit rude. I chalk it down to him being nervous for dropping out of deadline for MW2.
Anyways, all is fine now, but the first point in Jackerman's last announcement is directly referring to this "incident". It's funny that he was so touchy for Rebecca, in particular, but had no problem with your renders of Claire.
P.S. You should take it as a compliment that the original creator couldn't tell the difference between his creation and your rendition of it.