Hi, cantabene--
It's pretty likely I misunderstood our tour guide--perhaps he said "not sweet sherry" or "not sherry" or SOMETHING else! I had only been in Spain for two days at the time and understood less than half of what went on. I'm pretty sure it was sherry, but perhaps not sweet. All wine tastes bitter to me, so sweet/dry/whatever generally doesn't tell me much. It was good, though--perhaps I'll try a few drinks this weekend in Spain and see if I can come up with something similar.
Tara