I have never personally fed quail or chicks. I avoided that after talking with several breeders who did or had done it and told me the stories. A lot of colubrid folks will feed quail and have said the same as you here - messy at first, but then better overall. I wonder if those with constrictor-type snakes don't tend to give it enough time.
I'd be willing to try it if you have luck with it. Do let me know what you discover with this!
Btw, here's an interesting article, if you haven't already seen it, from JB at Deviant Constrictors that makes a very persuasive case for quail......
http://www.deviantconstrictors.com/b...r-my-boas.html