There's one caveat to this report that's important: the data is about two different sets of users. The web data is from comScore, and measures all US web users.

There's one caveat to this report that's important: the data is about two different sets of users. The web data is from comScore, and measures all US web users. It includes everyone from HN readers to the neighbor that checks email just once a month. The mobile data is only looking at US smartphone users (who own a phone that can run apps that Flurry can track), and excludes feature phone users or people with no mobile phone at all. Assuming high smartphone usage correlates to high web usage, web data looks comparatively low.