I had a little trouble with this tonight. A customer asked for a glass of Shiraz. I said we had a Cotes du Rhone by the glass, but no Syrah/Shiraz BTG, only by the bottle. I suggested he might prefer the Toad Hollow Cacophony to the CdR, but he asked for a taste of the CdR anyway. At least he said it was completely different from what he expected from a Shiraz, but then he ordered a glass of Merlot instead--and loved it.
I'm wondering which appelations of Rhone wines will be allowed to call themselves Shiraz. I would hope that it is only wines from Northern Rhone, not the Southern Rhone blends that are often less than 30% Syrah. And I also wonder if this will affect the percentage of Syrah that So. Rhone producers put in their CdR's and CdP's so they can call them Shiraz.