The MacBook Air, naturally, is meant to rely heavily on the WiFi network for moving files around. As expected, this can be tedious when first setting up your computer, because you'll want to move a lot of files.
It's been very tedious here. I started to tell myself, "this is incredibly bad." And it appears that is was, indeed, unbelievably bad: once I asked myself whether I could believe how much time I was spending, I realized that something was not right: our wifi network, it seems, is fouled up.
The root of the problem appears to be that the we're spread over three floors, and the top floor can't always see the signal from the basement. Sometimes it's there, sometimes it's not. And that means our WDS (wireless distribution system) is probably fouled up.