As of 2011 the paddle shifters in steptronic cars got changed so they match the DCT style + on one and - on the other. I just picked my msport 335d on Monday and it has the new style on them. I believe sport package has the same change as well. Not sure when the change was made though. My friend's 2010 335d has the old style paddles.
Btw 335is in the US also has the DCT as an option.
2011 335d Le Mans Blue Black Leather/Aluminum Premium M-sport w/ Paddles Heated front seats, Navigation, Comfort Access Split Fold Down Rear Seats Harmon Kardon, Ipod/USB, Sattellite Radio, Alarm
Picked up at welt on March 2011 : pictures of car during ED
Redelivered May 2011 : Pictures of Car after Redelivery