out of curiosity, did all dinosaurs have an S-curve in their necks?...
or were those restricted to the therapods?
Remember: This is the wrong place to spell "theropods" with "a".
ie, if an ankyosaur(sp) or ceratopsian ever evolved sans the frill and-or head armor, and had a longer neck, would it possess an S-curve (like a swan), or would it be stiff (like a giraffe), or something else?
for those wondering, this line of thought comes from a crackling sound in my neck.