U.S. paid search made solid gains in 2010 with 18.5 percent growth year-over-year, according to a new report from SearchIgnite. The fourth quarter (Q4) showed strong growth, increasing 35.5 percent YoY with December leading the quarter at 44.8 percent YoY growth. The Q4 holiday season indicated improved consumer sentiment, with the average order value (AOV) up 31.3 percent YoY compared to a 13 percent decrease in 2009.