When typing in the console it will try to autocomplete immediately. This is usually unhelpful and distracting. For example, typing "var b = false" will autocomplete to "validateAttachmentForm = back find".
I have noticed this as well. Julian: do you think we need to increase the timeout value?
Just wanted to note that this is related to bug 585991 and one fix might take care of both.
CCing waldo as he might have some ideas about making completion do deeper completion. Although we may need a new bug for that.
This is an old bug and the autocompletion mechanism has changed tons since this was filed. I don't find the case presented in the initial description to be distracting with the current implementation.