I will say as much that I at least don't recall this much being said about Sage, an actual humanoid character. There were comments about the way she's drawn's perspective being off, but I don't recall having seen anyone explicitly say things like "I wish she was skinny :(" like I have these dragons.
The Aquarius familiar though, unfortunately can't say the same. I wasn't here for that fam's release, but I have seen people's reactions to it from that time, and some of them were blatantly upon the lines of "it's fat, don't like it". Dunno how common of a sentiment it was, but it did exist. Gross :/