Sorry it looks like it is true
Source
http://www.ducati.com/racing/superbike/news/ducati_will_focus_its_technical_resources_on_product_development_and_will_not_participate_in_the_2011_world_superbike_championship_with_a_factory_team/2010/08/27/364/index.do?urlBack=%2Fnews%2Findex.do%3FkeyWord%3D%26dateToS%3D%26dateFromS%3D%26pageNumber%3D0%26categoryId%3D237%26titleOrder%3Dasc%26dateOrder%3Ddesc%26sortOrder%3Ddate%26fromSearch%3Dtrue
Superbike
27 Aug 2010
DUCATI WILL FOCUS ITS TECHNICAL RESOURCES ON PRODUCT DEVELOPMENT AND WILL NOT PARTICIPATE IN THE 2011 WORLD SUPERBIKE CHAMPIONSHIP WITH A FACTORY TEAM
Borgo Panigale (Bologna - Italy), 27 August 2010 - Ducati, having participated with a factory team in every edition of the World Superbike Championship since it began in 1988, winning 16 Manufacturers