Bo - for any sector over 9 hours, I'd expect to see between 6.5 and 7 ton/hr. For sectors 6hrs to 9 hours it seems to work out between 6 and 6.5 t/hr.
Have never seen it below 6 ton/hr and very rarely above 7.
Hope that helps - good luck with the course. Are you doing it in Dubai, or experiencing the delights of Toulouse?
t
PS Am talking about the -300 here. The -600 is substantially higher.