you also have to remember that in 7's rugby many of the top teams dont field their best players for numerous reasons - not wanting to get injuries, or just to blood new players and see what they are made of.
i will reply a little later on this thread, im at work right now.
i was at the dubai 7's a few months back, theres a thread i started here...
http://www.tfproject.org/tfp/tilted-...-rugby-7s.html