Bordeaux 2009 could be a "spectacular" vintage, according to Berry Bros & Rudd sales director Simon Staples, who has had exclusive access to some of the wines.
Despite reserving judgement until the main en primeur tastings next month, Staples says early indications are that the vintage will be worth "turning off the heating and selling the car" for.
"What is clear is that we are onto something spectacular again," he said. "What we have tried so far are all superb, rich, powerful, sexy beasts with great structure, depth and almost magical promise."
Staples said the wines tasted at Chateau Giscours were "breathtaking" and those from Cos d'Estournel "as good as 2005".
He added: "Both the Grand Vin and Pagodes de Cos were sublime. Cos itself was every bit as spectacular as the magnificent 2005, perhaps a tad fatter but with brilliant balance.
"Pagodes, with almost half the Grand Vin declassified into it, is off the scale. Without question the most impressive Pagodes I have ever tried and if you didn't have the Grand Vin to compare it with you'd say it was a great Cos."
Staples predicts that prices will reflect the quality of the vintage.
"The market dictates what prices the wines sell for, and with an ever increasing demand, especially from Asia, Bordeaux 2009 won't be cheap," he said.