I Didn't see this coming. I knew that sales were growing but I didn't know that sales growth was beating hybrids:
Although the national average price for diesel fuel has persistently stayed above the $4 a gallon mark for more than a year, it hasn't hurt sales of diesel models in the U.S. market. The Diesel Technology Forum, an industry advocacy group for clean-diesel technology, released figures from the first-quarter 2012 sales of diesel models, and it's clear that consumers are getting over diesel's former "slow, smoky and noisy" reputation. Diesel models' year-over-year gains were 21.2 percent in January, 42.9 percent in February, and 39.6 percent in March.
http://www.trucktrend.com/features/news/2012/163_news120418_diesel_auto_sales_increase/photo_02.html
For each month, diesel sales gains outpaced the overall automotive market (which also showed double-digit gains) and surpassed hybrid percentage sales gains for two of three months. The organization also notes this is a gain over the 27 percent overall increase in diesel sales for 2011.
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http://www.trucktrend.com/features/news/2012/163_news120418_diesel_auto_sales_increase/index.html