[brian paterson] "Do you know if the quality is as good as that of a blu-ray disc made with a dedicated burner"
No.
[brian paterson] "Finally how short should the content be to work fine"
20-30 minutes.
[brian paterson] "I would do some tests myself if I had a blue ray player and high def TV but sadly I do not"
Find someone that does.
"Fast Path to Blu-ray"
http://www.amazon.com/Fast-Path-Blu-ray-Bruce-Nazarian/dp/0970721854
Worst case scenario, create a "Digital Copy" for them for their iPad/iPhone/Computer.
Steve Eisen
Eisen Video Productions
Vice President
Chicago Final Cut Pro Users Group