Miker,

Yes, I'm aware of the 25% regulation (here) in the US. But even 25% of
the "savage grape" can be a lot when it comes to blends. I'm sure the
various wines I've noticed this in are at or below the limit, but I
still sometimes find it obtrusive in a variety which is ordinarily quite
different from Cab S. Don't get me wrong, a lot of times it adds to the
blend, but other times I think the heavy handed use of such a "big",
distinctive grape is more of a distraction than an asset. I've had
wines, as I imagine all of us have, which were sold as Merlot or Cab
Franc, and could have been passed off as a nice Cab S. Good wines, but
not what I wanted when I selected the variety I did. Maybe it's just my
pet peeve.

Interesting about the different rule for Concord, etc. I don't know that
I was aware of it.

Enjoy Mike MTM