When developing web applications, do user-friendly URLs matter?
Blog platforms seem to be split on the issue. For example, Tumblr posts are frequently in the form blogname.com/post/967129380
, which is less understandable than something like blogname.com/2010/08/post_title
employed by some (all?) Moveable Type blogs.
Is this something that an average user cares about, or is it a waste of time to carefully design each URL? (It's probably obvious to avoid using URLs like app.com/index.aspx?u=1235-08236.236,d41d8cd00b2427e:a25
, but how obsessive do I need to be?)