MS is certainly happy. They're happy because the Xbox 360 was the best-selling console during 2011 in the U.S., effectively outselling competitors with over 2.7 million units shifted, reports NPD Group.

"The strong December capped an impressive year during which Xbox 360 was the fastest-growing console. It also captured 49 percent of consumer retail spending, with an industry-leading $6.7 billion in sales in the U.S. for the calendar year—more than $2.1 billion on consoles and $4.6 billion on games and accessories, NPD data shows."

Here's more data from NPD:

• Holding a 46 percent share of the overall current-generation console market, Xbox 360 sold more than 1.7 million units in December, solidifying the number-one console spot in the U.S. for 2011. This marks the tenth consecutive month Xbox 360 has held more than 40 percent of the current-generation console market share, and twelfth straight month Xbox 360 was the top-selling console in the U.S.
• Total retail spend on the Xbox 360 platform (hardware, software and accessories) reached $1.5 billion, the most for any console in the U.S.
• Xbox 360 had seven of the top 10 console game titles including: “Call of Duty Modern Warfare 3,” Elder Scrolls V: Skyrim,” “Battlefield 3,” “Assassin’s Creed: Revelations,” “Just Dance 3,” “Kinect Sports Season Two” and “Dance Central 2”.
• For 2011, Xbox 360 had six of the top 10 console game titles including “Call of Duty Modern Warfare 3,” “Elder Scrolls V: Skyrim,” “Gears of War 3,” “Battlefield 3,” “Madden NFL 12,” and “Call of Duty: Black Ops”.

Hm, wonder how Sony did...