GGV, it's not that I don't believe it is sensibly based, it's rather that I don't think it will have the desired effect i.e. ensure safety of pax and crew.
As an attempt to ensure that refuelling is carried out safely during a rapid turnaround with pax dis/embarking, OK a vigilant crew member is likely to spot the problem and prevent the accident. Stood under the nose cone fiddling with the connector trying to get the damn thing to work; not so effective.
It just strikes me that this 'solution' has too many compounding elements e.g. less time to prepare in cockpit to be the correct solution.
So what is the answer? Slow Down, perhaps. Safety should be the primary concern of JAA, economics second. And as Blacksheep notes, we could be talking about c. £20 here to have someone competent do this job; with just 100 pax that's 20p each!!