They are the main importer for the US unfortunately, and most other bottles bearing the Vincent Dauvissat label in the US are likely grey market.
I will caveat this with the fact that what I’m about to say is speculation on my part that is based purely on anecdotal evidence, but I’ve come to believe that the vineyard brands bottlings are more susceptible to premox. Here is an excerpt from oxidized burgundies.
”The US cuvee of the R&V Dauvissat wines (imported by Vineyard Brands) is apparently bottled at least 3 to 4 months before the european versions of the same wine and the Dauvissat-Camus labeled wines (imported by Grape Expectations and Classic Wine Imports.) The Vineyard Brands versions of the Dauvissat wines are typically bottled in November of the year following the vintage and are usually offered for sale in December of the year following the vintage. The European version of the same label and the Dauvissat-Camus wines spend an additional 3 to 4 months in oak and are usually bottled in February or March of the second calendar year following the vintage. Additionally, according to Steven Tanzer, in the past some of the Vineyard Brands’ cuvees have been filtered, whereas the later bottled cuvees are generally not filtered. Be aware that the finished wines that have been reviewed in Burghound, IWC and Wine Advocate which have been tasted at the estate have had an additional 3 to 4 months in barrel (and may be unfiltered cuvees) and thus are not identical to the Dauvissat labeled wines bearing the Vineyard Brands strip labels. Whether the Vineyard Brands cuvees are better or worse than the others from a premox perspective remains to be determined.“
I have purchased most of my Dauvissat through grey market sources direct from France and 95% of those bottles are with wax capsules. I’ve never had an issue. I will also say that most of the wines I’ve opened over the last 2 years are 2008 - 2014, but I have had some as old as 2004. Again speculation, but still an interesting finding.
@William_Kelley has spoken about it at length on this forum, and he would cite that premoxed Dauvissat does occur in France too, but it does seem to be much more common in the United States and Vineyard brands is the common denominator in the US. Whether it’s the earlier bottling date, or maybe certain vintages that were handled poorly through the supply chain who knows. 