[cpks]

It depends on context.

First-order:

* At a computer ==> Text * Commuting ==> Audio/video

Second-order depends on things like type of content, cognitive load, etc.

[jghn]

Agreed that commuting (for some forms of commuting) text is suboptimal. I ride on a subway so it doesn't really matter to me but I can't read blogs while driving for instance.