In the eye of the beholder, surely. Is Rousseau worth £1k a bottle en primeur and £2.5K+ in the open market? I love GPL at the £50 a bottle IB mark, but does it have the sheer finesse of a Latour or a Lafite? No - but is it worth 10 times the price? To some it is, others not... I will indulge myself in a few bottles of very top wine this en primeur - probably Lafite and Cheval Blanc and I will drink them on special occasions. But I don't have the level of disposable income to play regularly at this level.
The only Latour that's blown my mind is the 1970 from a cold cellar - although I am coming to realise that I'm probably a Lafite guy.
To put it a different way - much as I'd love a Ford GT (in Alan Mann Racing colours, of course), I'd also be very happy with a Dark Horse Mustang. The price differential is not dissimilar.