I’ve been lucky when it comes to Gruner Veltliner, one of the great grapes of Austria. Through friends who have worked for various importers over the years, I’ve been introduced to some incredible renditions — expressive wines of intensity, balance and flat-out deliciousness. With that as context, I’ve been a bit let down by most New York Gruner. I used to chalk it up to young vines, poor picking decisions and winemakers getting their footing with it in the cellar. I still think that’s true in some cases, but I’ve also been guilty of not allowing the grapes to express what…