Yeah, I noticed that too. It really does look the same, but maybe that's because of the video quality. For all we know, they could've reanimated the entire pose (a pose all raptors might do before they strike). I don't think it's necessarily a placeholder - wouldn't that itself be work, to crop that from the original movie and fit it in?
edit: Did a side by side comparison and they look so damn identical (the wrinkles on the bottom of the neck) you're probably right about the placeholder business.
