The US carb numbers in wine, if you can find them, apparently include other remains from fermentation that should have minimal effect on the blood sugar. In European nutrition info these extra remains are not included in the carbs on any nutrition facts label. It's more like:
- Champagne or sparkling wine (brut or extra dry) - 2 carbs per serving (5 or 6 fl oz)
- Dry red or white wine - 2 carbs per serving (5 fl oz)
And some of the articles I've read plus my database list Pinot Noir as one of the lower carb red wines.
https://www.dietdoctor.com/low-carb/keto/alcohol-guide
I'm pretty sure this article is free access. There are lots of reference links that let you study further.
I drink wine on my ketogenic diet, but not every day at the moment, nor even a full serving. I'll usually have 75 ml, or at most a 4oz serving 2 to 3 times a week. This serving size goes reasonably with a meal and doesn't cause a buzz for me. I'm still using the old-fashioned carb counts for the wine servings as that's what is in my database.
As I transition above my current 20-25g net carbs daily limit to a higher limit approaching 50g, more wine is definitely on my list along with more fruit and larger servings of cooked vegetables.
I am looking forward to sampling some 0 carb Armagnac brandy in southern France!