I won't disagree with your observations. I will however point out one thing: the sampling is skewed because you only really see what people are doing in public.
I would guess that the majority of iPad usage is in the home and, to a lesser extent, in the office, so much so that I probably won't even buy the 3G version of the iPad 2 (I have the 64GB 3G iPad). Plus now I live in New York (rather than Australia, when I bought mine) and wifi is much more readily available here (Starbuck's for one) if I feel inclined to take it with me and need the internet.
One disappointing thing is that Apple seems to be doing the big CPU/memory upgrades of the An platform with the iPhone, not the iPad. This is annoying for two reasons:
1. The iPhone 4 came out a mere ~3 months after the iPad. Are you telling me that this 3 month gap meant the iPad couldn't have 512MB of RAM like the iPhone 4? Presumably, the iPad 2 and iPhone 5 will be on a similar gap; and
2. I'm more interested in processing capacity on the iPad than an iPhone.