Good question, I suspect that as this is the way they have always done it, maybe the commentators keep their scraps of paper/notes as momentos of each event and keep doing it this way so when the electronic one fails they can still give out times,positions etc without having to start panicking cos they haven't got the info which would be critical to pit boarders/signalers who would be listening in via normal radio not internet?
Good racing yesterday though.
Russ