I would say more end of year discounts, they were similar last year end. Even at that, most folks have been able to get a consistent ~$10k off of MSRP when including all the various discount programs at any point in the year.
My personal opinion is that North America has been a test bed for their new emissions systems on the diesel and they want to get as high a number of test subjects out there being shaken down as possible before the switch gets flipped over in Europe, big incentives help do that. Just my opinion though.
Herbert - '12 X5 35d / Sapphire Black / Black Perf Nevada / Aluminum trim / ZPP / ZPS / ZCW / ZAV / Apps / 3rd row
Betty - '04 CTS-V / Black Raven / Black Leather & Suede / 6 speed LS6 combo 400 hp & 400 tq
Sterling - '06 Silverado HD / White / Grey Leather / LBZ Duramax - Allison 6 speed combo / Crew Cab Short Bed LT3