Hi all,
I have only read the first page of this thread because I got bored and so I appologise if I am repeating someone here.
I am an FI in the UK and have to admit that although I had heard this theory, hadn't actually read it in the syllabus. But lets be honest, if flap retraction on short field landings is neccessary for maximum braking efficiency, you sure as hell aren't getting back out of that field again anyway since TO requires a lot more field in SEPs than landing.
Regardless of it being in the syllabus, I will not teach my students to fiddle around with flap levers on the ground roll. If its that short they shouldn't be going there.