Just a couple of comments:
I wasn't aware that dinosaurs were classified as
reptiles at all ... aren't they dinosaura ? Hopefully someone
will clear that up for me.
Warm-bloodedness for dinosaurs isn't that new. I have a dino. book
for kids that I get about twenty years or so ago that mentions
that certain traits of creatures such as T-rex suggest warm-bloodedness.
It's by no means settled that birds are a type of dinosaur (although
I think it likely myself before anyone tries to convince me
).
Ornithologists will point to which toe is missing in dino. fossils
as compared to developing bird embrios, for example (its a different
one apparently).
There are, however, fossils coming out of china that seem to show
progressive development of feathers from small straight stubs, to
something like modern bird feathers (with a number of stages
in between).
I found walking with dinosaurs very mis-informative. It focussed
on behavioural features that we just do not know. It took modern
wild-life documentaries, found a dinosaur that might have filled
that niche and re-made the show with cgi dinosaurs. Technically
nice to look at, but severely lacking in content.