mine defaulted at 0 as well as I believe this is the standard setting. I also use a wheel but found that if you put the sensitivity level at 7 for in particular the Vettel challenge you'll knock several seconds of your time immediately as it takes away most of the lag from the stick. I use level 7 for everything now as I actually do prefer a DS3 to a wheel
i find every car has a differant feel... a Rear wheel dreive car i use 7... Front wheel it use 4.... for FGT & X2010 i use -1. test each car. if you havnt noticed each car savesthe settings you use... i.e traction control, skid recovery...ect. everytime you get it a car you need to change the setting you would like the car to have & it remembers it for that car