No one is certain, as the test had Secret Service levels of security. But speculation is rife around Europe - complete with media reports from "spies" near the circuit - insisting that Ducati Corse used an aluminum chassis built by FTR on Thursday.

If Ducati is using an aluminum frame, it's learning the secrets of alloy speed quickly. The Italian media reported Rossi turned a top lap of 1:48.05 Thursday, just seven-tenths behind the top lap turned by Casey Stoner on Honda's 2012 bike during a test in July in the Tuscan hills.

http://www.superbikeplanet.com/2011/Sep/110912mu.htm
Interesting if true.