I modified the comment form a couple of days ago. It seems that there is a convention requiring commenting people to fill in all their details prior to to writing a comment. A comment being a thougt provoked by a post may be a fleeting thing in the head of the commenter. The inspiration that flares up in the spur of the moment may be hampered by a suggestion to do rutine tasks before beginning to write – and thus I applied some writing pedagogy to the comment-flow: write first, think later.
I suppose a filled comment field is also a better incentive to filling in details, than filled in details is to writing that geniuos comment.
Yes, I know that you can simply click in the comment field, start writing, and then fill in the details, but the layout suggest another action.