It's a pleasure Michael, an my respect for you and Gaz (and others here) is the same.
Barros denied a podium to Stoner at Mugello 2007 because of a better tire choice -- that's right, but that nevertheless means that Barros beat Stoner in that race. Tire choice is made mainly by ther rider, who is not obliged to follow the manufacturer's (or even the team's) advice.
Capirossi beat everybody at Motegi that year, -- thanks to a good timing in changing bikes after the rain, no doubt, but again Stoner couldn't do better than 6th on the same bike. These were exceptions, but the fact that such exceptions didn't happen again in the following years says that the 2007 Ducati was a strong bike, certainly difficult to ride to the limit (also because of the peaky character of its screamer engine about which Capirossi complained) but it didn't have any oversteering, for example.
I think the difference between Ducati and Honda/Yamaha now is mainly in the riders -- I hope Dovi and Iannone prove me wrong, possibly next weekend, but I can't help thinking that Marquez, Stoner or Rossi would have already won a race on this Ducati.
The concessions help a lot for the development and testing, imo, but do not magically increase the speed during a race weekend -- nobody has fuel limitations in QP and while the extra soft helps in quali, the lack of the extra hard option can be a handicap during the race when it's hot, as it was in Argentina.