Tom,
There is no validity in arguing on what you've read, or in spouting quotes.
Being written is not a guarantee of validity (unless it includes good experimental data or mathematical/scientific proof).
E.G One volume of TBB says the Mary Rose was raised from Plymouth harbour.... no it wasn't it was raised off Portsmouth... (I used to live down there and one of my old school mates was one of the divers).
People on here are interested in what you can do, make, demonstrate or at best an opinion based on solid experience.
The authors of books have had their say, and they can argue if they wish (if they are still alive!).
Many of us are published either on paper or on line, and where that is the case, we publish from our own experience.
You say:- "Ok but I'm really not trying to argue with anyone, I'm asking for evidence".
No one wants you to argue... your original post simply asked
"Why do whip ended bows have a bad reputation?"
It only ever needed one answer...
"They don't"
Being blunt, I for one am not interested in someone regurgitating the work of others, which they often seem to misunderstand or misinterpret anyway...
To quote a well known TV show:-
"And for that reason I'm out"
Del