Reporting its fourth quarter 2011 financial results today, Apple said it sold 6.62 million iPods during the quarter—a 27 percent decrease compared to the same quarter last year. Apple sold 17.07 million iPhones in the quarter, a 21 percent increase year-over-year, and down slightly from the 20.34 million units sold in the third quarter. Apple also sold 11.12 million iPads during the quarter, up 166 percent from 4.19 million units in the year-ago…