Oh, I would bet the farm. Considering the Earth flat as a wrong turn by scientists is stretching it just a 'little'. This observation was made with actual investigation just like the Sun revolved around the Earth. Once instrumentation was available to take measurements and observe the 'heavens' better these ideas were debunked.
There is an exhibit currently touring the country, at The American Museum of Natural History in NYC until Jan. 2006 then moves on to other places like Chicago & Philly (I think). There are presentations showing much more detail in the relationship of dinosaurs to birds then written in this article. The T. Rex finding evidenced by the 'soft' tissue found in the bone just added another piece to the puzzle in support of this thesis. This dinosaur was 'ovulating' when it died so the process could be studied. Now why would birds use the same 'shell' layering as a dinosaur if not because its (bird) ancestor was a dinosaur. Makes no logical sense otherwise.
Now over the years opinions on dinosaurs have changed. But this change was from 'picturing' them as clumsy/lomburing(sic) animals to actually at lot more agile then thought. There are dinosaur fossils with similar pelvic structures as modern birds. Tails did not drag but held aloft so as to act as a counter weight in balancing the body. All these new findings do not negate the evolutionary process they just fill in the gaps.
As to your comparison to 'eggs' and first good then bad then good, etc. Well, I really on my Registered Dietician whose knowledge of body chemistry is more than mine and eggs in and of themselves are not 'bad' but it is the interaction with your bodies chemistry that can make them 'bad'. If your cholestral is high then eggs will add to that problem.