I can see it as rational from a number of viewpoints - "When user types 'fo' they want to go here, 'foru' usually results in this, 'forum' has this result etc etc.
But I think all those other viewpoints lead to less desirable behaviour, for me. I'm not going to pretend it's universal because I don't have the research, but it pisses me off.
But I think all those other viewpoints lead to less desirable behaviour, for me. I'm not going to pretend it's universal because I don't have the research, but it pisses me off.