Interesting how the TechCrunch article cites the "qualitative research" of simpsoncarpenter.com -- whose site my grandmother would never navigate to find whatever article Mr. Carpenter wrote about the iPad. I guess he knows about what "won't go mass market anytime soon" from his own example.
For HNers purposes, quantitative research might be more significant. Me, for example. I don't care whether an iPad has no place in my work/personal life.
I do care whether enough (quantitatively) people are purchasing/using iPads to influence my business decisions about how I target my app development work. (I know, I'm a mercenary SOB, right?)