August 21, 2009 8:59:25 PM EST
Grenache as alternative variety is a controversial issue as Caughtredhanded says. I agree with most of what you say but it is a SA centric view.
I base my inclusion of grenache as an alternative on a few points
The variety was subject to vinepull schemes for quite a while and it looked like it was heading for obscurity.
In SA it is very common, always has been, not just for fortifieds but also for blends - in the 1960s they were called claret now they're called GSM. But elsewhere they are rare.
Varietal grenaches are fairly uncommom.
Grenache is not grown much outside SA - a pity I think.
The Australian Alternaive varieties show included greanache as a permitted variety until a few years ago, but not nay more so it is an open question.
I am leaning to the view that grenache varietals, ie >85% should be regarded as alternatives. However I think it is a bit difficult to discombobulate varatital Greanches from Grenache blends.
BTW I think varietal Cab franc is "alternative" but most of it is used in blends with Cab sav.