It’s not uncommon as it increases the pH and gives it more roundness and texture/structure. I will say though that when he served his most recent stuff it was quite tannic with very good acidity (2012). The fruit was obviously there, but I’m hoping they’re more long-lived. I was pretty impressed with the overall direction and style.
I think most Americans just don’t like the taste of traditional styles of Sherry. I really don’t think it will ever take off in this country, despite the high quality and laughably low prices. I poured Valdespino Inocente Fino at an all-European tasting a while back, and out of the many people who tried it, only one actually liked it. I know that’s just one tasting, but from selling wine to the public for some years, I’m pretty confident about my opening sentence.