Intel Wipes Out AMD's 2006 Marketshare Gains in One Quarter
 

The price war that is waging between Intel and AMD paid off handsomely for Intel in the first quarter according to the latest numbers from Mercury Research. Intel managed to capture 80.5 percent of the PC processor market for Q1 2007.
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The strong performance by Intel in Q1 represents a whopping 6 percentage point increase from the 74.4 percent share that the company held during Q4 2006. The increases per segment come in at 8 percent for the desktop market, 4 percent for the notebook market and 7 percent for the server market.

http://www.dailytech.com/article.aspx?newsid=7051

I think it is interesting that they say that AMD oversupplied the OEM market which is responsible for the shortage in the retail market.