Are you saying it should have been easier or harder for Apple to move this many units?

I imagine steve19 is saying it should be easier to move iPads than Mac computers. People already have computers in the traditional sense and are generally happy with them; there isn't a pressing need to upgrade more than every few years. In contrast with this is the iPad, a brand new product that people can purchase on an impulse (due to its lower-than-a-computer price) and show off to friends.