The supermarkets might be able to confirm or deny this by comparing relative sales of Sauvignon Blanc and Chardonnay - the crisp and lean one versus the round and buttery one. But for us, as always, the picture is a little more detailed. There's been, perhaps, a gentle shift away from the Sauvignon end of the spectrum - the fresh, zippy, astringent wines - and so we've been recommending Chablis (Chardonnay), Viognier and some of the white Grenache-y blends from the south of France. I've linked to a not-too-overwhelmingly rich suggestion in each case. I tend to resist buying whites from the Rhône (white Châteauneuf-du-Pape, eg) when Bubble Brothers are offered them, because their concentration is often perceived as "headachy" - but perhaps the time for fullness will arrive in the fullness of time. Maybe we should do a tasting across the spectrum one of these days, and see what people think.