Paddington wellies & zeddb - on your point about experience levels, you don't say which way around it is. A guy I know with over 7,000 hours got 70% recently, whilst a few months ago I know of 2 guys with under 3,000 hours that got 100%, so does that fit in with your theory in that higher experience gets 70% and lower gets 100%?
Of course I know that things change regularly depending on their requirements.