Because he was a 9 time WC, everyone expected immediate results?
Not true really. There were of course those at the two extremeties of opinion, the Rossi fanatics who were adamant he would easily surpass Stoner's acheivements on it immediately as Stoner was a crasher and no longer had the 2007 'best bike'. Ross and JB would repeat 2004. Then there were the haters who willed him to fail.
Somewhere in the middle, realists who didn't really know what would happen but most probably hedged their bets he wouldn't get the results Stoner did, purely because of the previous experiences of Capirossi, Melandri, Hayden and others.
Saying only idiotic fanboys claimed the bike was good isn't strictly true either. Remember what Burgess said - We have something very very good to start with, we're starting from a much better place than we did in 2004. He also claimed the bike didn't have a front end problem and both he and VR attributed that to Stoner pushing too hard too soon in a race.
You're right when you say you can't have it both ways, but that cuts both ways. There were ridiculous claims and accusations flying from both sides of the fence and some of the less graciuos things that VR and JB said about Stoner and his crew's approach certainly fanned flames on one side.
However, it's history done and dusted and no longer relevant. 2013 has arrived, different bike (almost) different riders, different boss, different approach. Let's hope that it all equates to an upturn in Ducati fortune in Motogp. A lot is being made of the times set by some riders in Jerez, so if you apply the same argument to Ducati, they have moved closer.
However, the reality again is that is testing, testing in less than ideal conditions at that. The first two / three races will give a better picture.
All the stops pulled out, Ducati front row lockout by Mugello...