As said DF, you are one of the reasonable 27ers..the initial point about tyres was made to illustrate a long standing bone of contention of which maybe you are unaware.
Bulto has made the point that tyres became less suited to the Ducati as time went by in the spec era. Hayden mentions it here. Stoner is on record saying the same.
Bearing this in mind and given how it seems to be fanboy folklore that Rossi couldn't ride the Ducati and was embarrassingly slow, wosi has tried to illustrate previously with lap/race times that in fact this is NOT the case.
We often here talk of the gap between the Jap bikes and Ducati, how it's got bigger..bigger than at any time in the past. If Rossi went notably slower on better tyres against opposition that had not developed that gap, as seems to be the claim with some typically unresearched, orange fanboy claims..fair enough. There would be little room for debate.
As it happens, this is quite simply not accurate.
Rossi was faster than Stoner @ Qatar, Estoril, Le Mans, Catalunya, Mugello, Brno, Indy & Misano early to mid 2011 when the CF bike still existed.
He was faster at Qatar because he finished the race 2011, whereas Stoner crashed trying to go too fast. You can't leave out crashes because it doesn't suit your point. In that race, Rossi lapped as fast on the Ducati as he did the year before on the Yamaha. 2011 he finished 7th. 2010 he won it. This illustrates the widening gap, 4 works Honda's and the effort HRC put in to make sure they won the last 800 title, something they HAD to do to avoid significant corporate red face.
If you can be bothered to check, you'll see that the at the above mentioned tracks, Rossi was faster on total race time and/or posted a faster lap, admitedly not the case at Qatar where his race time 2011 was a second slower than Casey 2009. Casey won..again illustrating the gap.
When I aired this train of thought after reading elsewhere and posting relevant links to support..the excuses came rolling out. Conditions were not the same. The tyres had improved. etc. etc.
Nostro even went as far as to say Stoner hadn't gone any faster on the RCV in 2011 than he had in 2010..without any supporting evidence other than his own opinion, of course.
Perhaps you'd be so good as to read the link and give your opinion?
Was Rossi really embarrassingly slow..with better tyres?
What about the competition moving on?