Fortune reports netbook sales are no longer growing. The growth of the netbook market has been trending down since Apple announced the iPad on January 2010, and last month sales dropped 4 percent.
"Tablet cannibalization" -- chiefly by Apple's (AAPL) iPad -- is at least partially responsible, she suggests. Her evidence:
* NPD data showing that after six months of decelerating growth, U.S. retail notebook unit growth fell 4% year over year in August, marking the first time those numbers had actually gone negative.
* Similar data for the first week of September showing that units fell 4% year over year again.
* BestBuy CEO Brian Dunn's widely repeated remarks in the Wall Street Journal that "internal estimates showed that the iPad had cannibalized sales from laptop PCs by as much as 50 percent."