John Paczkowski points out the lies, damned lies, and statistics regarding Mac sales. They’re up. And they’re down. It all depends on who you talk to. The top two market research firms gave strikingly different numbers for Mac shipments in the spring quarter. From All Things D:

So what are we to make of this? A disparity of more than 200,000 units between the the Q2 domestic Mac shipment estimates of two top market research outfits? Is it a 2.5 percent year-over-year increase. Or a 12.4 percent year-over-year decrease?

I just flipped a quarter to determine whether sales are up or down.