Apple is already having a good start to 2010, notes Piper Jaffray analyst Gene Munster. New NPD figures show that Mac retail sales rose 36 percent year-over-year for the month of January, well above a Street consensus of 18 percent for the March quarter as a whole. iPods were meanwhile up 5 percent for the month, in stark contrast to Munster's call for a drop of 17 percent.