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I honestly couldn't tell you. Last I heard, the heart was legit. I used to belong to a forum for paleontologists and paleo-artists, but I haven't spoken to them in years, otherwise I'd ask them. If the heart wasn't a heart, then that's that.
Also, they found that
-psittacosaurus had quills along its flank and tail
-Velociraptor had feathers (at least long primary feathers attached to its arm bone)
-Small ornithopods developed feather-like quills on their body. Not sure which species, but it's interesting because we weren't sure if they were feathered or not.
I'm more in tune to the whole "dinosaur/bird link" aspect of paleontology.
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I thought that there was some discrimination between the species of raptors as to which had feathers and which didn't. For some reason I'm thinking that the Utah Raptor was heavily feathered [and by 'heavily' I just mean for a fucking dinosaur] and others were 'naked', if you'll pardon the term.