Well I guess this means that Ducati don't believe Stoner will be a 'Threat' on the Honda then.......
An alternate view could well be that Ducati are repaying Honda who released Hayden at season's end and as such are reciprocating that pleasantness from Honda.
Alternately to date there is no 'equal' rider swap between Ducati to Yamaha that needs or is deserving of a similar approach, although one suspects that if a Ducati rider signs with Yamaha then that may be treated differently to the CS to Honda deal.
Gaz