Yes.
I would also guess that the framing of this problem is also the cause of some of the confusion. As others have noted, newborns are not the optimal target of a cuteness response, that would be something more like four year olds, e.g. maximally expensive children with a large sunk cost. Also, Alicorn may have unusual perceptions of cuteness and no-one may have wanted to contradict a perception. I just actually looked at Google Images and my conclusion is that babies are cuter than bunnies, though not by enough that as a good frequentest I could refute that null hypotheses that bunnies and babies are the same thing.
My wife and I have previously observed, while walking in the park, that as the theory predicts boy babies are cuter than girls except when the girls are Chinese, presumably due to the greater parental investment required by boys and the history of unusually frequent female infanticide in China.