This article by John Croft was first published on FlightGlobal’s website in October 2009. It is interesting in that it cites a study by the US FAA’s Office of Aviation Medicine which revealed a “large disparity” between how pilots with aerobatic backgrounds perform compared to those with only ground-based simulator experience when recovering an aircraft from an upset state.
http://www.flightglobal.com/news/articles/faa-pilot-performance-questioned-in-upset-recovery-334257/