Barclays Capital analyst Ben Reitzes is not prepared to lowered his estimate of year-end Mac growth down from 22 percent, despite recent data from research firm NPD that showed Macs growing at about half that rate in the US, reports Barron's columnist Tiernan Ray. Reitzes is reiterating a $555 price target for 2012, rating AAPL "Overweight" and says the company will again outgrow the rest of the computer industry in PC sales.