iPad sales are only going down from here, but maybe he should listen to that age-old idiom: people in fragile economies shouldn't throw stones. According to iSuppli's latest report on the global PC market, Acer slipped down to third place after losing 6.2 percent of its market share compared to last quarter. Dell, meanwhile, lost a relatively slim 1.2 percent of its share, bumping it back up to second place -- a position it had previously given up to Acer. Meanwhile HP still sits on top, commanding 18.1 percent of the market share, though that too is down, 6.3 percent over last quarter. Still, all three are well up over last year, an encouraging sign in these supposedly troubling times.