I'm not a seller so I am just asking about the question in Feedback about sellers meeting the delivery date.

IMO eBay's estimated delivery dates seem to be pie in the sky more than ever.  Not just for overseas purchases but for Oz ones as well.  So what is the purpose of buyers answering whether the delivery was 'on time' on not?  Is it for eBay to get their delivery estimates better or is there some penalty to the seller if items arrive 'late'?

I'm happy to say Yes if my purchase arrives on or before the estimated date but I'm not so sure about saying No when Blind Freddy can see the expected date was bound to be unachievable.  If it's for eBay stats there's no problem but if it affects sellers I'd rather leave it blank.