You just answered yourself LL with that post.
I'm not convinced that GG was "taking the piss" as you so eloquently put it. He had a valid question, and he has a right to it. Same with me.
Since you don't seem to wish to understand my point I will courteously spell it out for you.
Taking full length is an airmanship decision which allows a higher V1 speed, and often greater margins.
LL, your post towards GG was insulting, as was your last to me. You should learn some manners. Have a nice day....