"Over the past two years, (Ducati) took some unfair criticism saying they didn't try enough to give (Rossi) what he wanted, and I certainly disagree with that," Hayden said. "I think they went above and beyond trying to please him, and unfortunately that was a little bit negative because maybe we tried too hard to improve and made too many big changes during the season."
http://www.superbikeplanet.com/2013/Jan/130117lpksc.htm
Pretty interesting perspective also from Ciabatti, something I never thought about
"It isn't that we don't have confidence in Rossi's feedback," Ciabatti said. "The pressure and the lack of results created a vicious cycle in which he wasn't relaxed enough to completely test the material prepared for him. We simply believe that there is potential and that it wasn't completely explored last year."