Is this still true?
Now, to be honest, it accords with both my own experience and my own (yes, ingrained) prejudice.
Until I had been a member of this forum for years, and was made aware of the genuine and wonderful revolution that has taken place in micro brewing the in US, I would not have considered myself open to the idea of contemplating trying American beer. However, some of the stalwarts here persuaded me to try Founder's and - yes - I am happily won over, by their quality and wonderfully balanced flavours. A terrific beer, and one I will unhesitatingly recommend.
But, I will not touch American wines. These days, you don't see them in Europe, except in the corner of department stores where various cheap and unsophisticated horrors dwell. In the 80s, the American wines I recall having sampled were perfectly awful, and I told myself that an country which had passed Prohibition couldn't possibly know the first thing about wanting to craft well made, balanced, subtle wines.