If anything, rain should be a hindrance for the stiffer Ducati chassis. It should handle comparatively worse. Speculation on my part, though.
rain always brings serious compromise to all, including the m1s rear grip issues. And judging by the way the new Hondas launch off the turns it will also effect them and their setup. The duck has been quite good in the wet, and as the issue seems to be turning it with the throttle, then the slower speeds in the wet should help as shown in morning warm up.
Jorge and pedders never have been great in the wet with Rossi and Stoner being far more dominant in these conditions. Should be interesting.......