I've never heard of such a thing. I would've gotten complaints then because I'm slow at giving feedback.
On some things if you don't have feedback over 100 then you have to wait until either you get a positive feedback from the buyer, or paypal verifies the delivery for Paypal to give you the money, otherwise you have to wait almost a month for it to automatically go to you.
And the guy was being rude to you about trying to get feedback. As a seller I'll give feedback after I know the item was delivered successfully (like if the buyer doesn't try to screw me) as a buyer I'd send feedback after I got the item.