Wait, from what I understood the Best Buy CEO had clarified to say that he was talking about netbooks, not notebooks. In fact all the comparisons I have heard have been about netbooks.
Not exactly, but sort of. Here's the quote to parse:
"If 100 people came and bought an iPad, what we saw was that 50 of them--and this is just compared with previous netbook trends in that store in that week--50 of those people were incremental, and there were 50 less netbooks sold versus if there were 1000. You follow me?"
In other words, 50% of people who bought iPads at BB bought them instead of netbooks (in this particular week). There's no 50% drop in netbooks sales, however, as BB (as he later explained) doesn't sell many iPads - thus idea that instead of selling 1000 netbooks, they will sell 950 because 50 people who would have otherwise bought netbooks bought an iPad instead.
It's interesting that the BB CEO communicates about as well as the average BB salesperson.