I once saw a message from a Lambo lottery winner, I think it was in this forum thread, I don't remember how long ago it was, but it definitely happened. He then received about 3.5BTC on his freebitcoin balance and in his personal account statistics it was shown as a deposit. And about Lambo and other expensive prizes in WOF - Rolex, iPhone and Amazon gift card - these are not real prizes, but conditional designations of the winning amount, for example, Rolex is a prize of $ 10,000, iPhone a prize of $ 1,000, Amazon gift card $ 500 or something like that. And Lamborghini is a conditional name for a prize of $ 200,000
IMHO

There have already been at least 3 users from this forum who won the Lambo lottery on the freebitcoin site. This is Kryptoverdienst, who won 3.08 BTC in round 5, then soslex won 10.27 BTC in round 7, and Kingqa980 won 7.44 BTC in round 9.
As for the prizes, the terms of the Lambo lottery stated that a winner could get a physical prize, i.e. a car if desired. However, all winners obviously chose BTC, as a physical prize implies additional shipping costs and fees.
Absolutely correct, I also have once read the terms and conditions that comes with winning items and choosing to get the item physically shipped to you, specially with the lambo, I read a line which states that one can actually get a physical lambo shipped to him if that's his choice, but the duty of the company is to buy the lambo, every other expenses from shipping cost to clearing and duty charged falls on the winner of the lambo, and to be honest, in most countries, shipping, clearing and duty charge will cost a whole lots of money, before one begin to talk about registration and licensing, and this is not to even consider the risk that comes with shipping, any thing (an accident) could happen which could lead to loss of item.
I guess all this is the reason why all winners of any physical items haven't always opted to get the equivalent worth in bitcoin, it's fast, safer, more convenient, and also an asset that could appreciate in value if the winner decide to keep it for sometime.