My point was and is that no one HERE said any of those things. You found someone that did say that. However, don't blame me for their poor writing about avian evolution.
I have several problems with the quote. First, the language makes it seem that Pterosaurs were what was "turning into birds". This is flat wrong. A cursory comparason of anatomy would tell you that. Even if the author was talking about dinosaurs "turning into birds", that language is far too imprecise. It implies that all dinosaurs became birds. A truly ridiculous proposition. That is not how birds evolved. If you have been laboring under the impression that is how scientists viewed bird evolution I am sorry you found that article. It is wrong.
I would recommend this book - "Taking Wing: rchaeopteryx and the Evolution of Bird Flight" by Pat Shipman. It gives a good summary of the evidence, thinking and battles in the science of bird evolution.