Bob,
I waited to see if anyone else would be willing to respond to your well thought out questions. Not the case, so I'll do my best by tackling it, since in my newsletter and in our tasting note database, the majority of tasting notes on Madeira are mine (for better or worse).
The IVBAM (Instituto do Vinho, do Bordado e do Artesanato da Madeira or Madeira Wine, Embroidery and Handicraft Institute) was only created in 1979, actually back then it was the IVM (w/out the embroidery nonsense included, until merged in July 2006). The IVM followed the old Junta Nacional do Vinho or National Wine Council. Neither held much power and although they do regulate production, records and many other facets of the drink we love, there's never been much information disseminated by them OR the producers, about quantities of production or what's in storage. You can go see it for yourself when visiting the island and the shippers are a bit more upfront as they get to know you, but to
expect an importer to know this ... will only deliver disappointment.
The 8 remaining Madeira producers that export from the island and limited few that only sell on the island, do not release that information easily. nor is it a secret, per se. The producers don't see any need to disclose what they have left in cask or how much gets bottled and it is ever changing; except for newly vinified products. It is one of the mysteries of Madeira.
But I do agree with you that having that information
out there would help in being able to accurately portray and promote their product better. That said, I believe that Madeira producers are pretty happy (in general) with sales in the USA/UK at this time, and for their older product, don't want it to be too highly sought after, so they can maintain these older stocks. It is their duty to pass on to their next generation, the old wines they've stewarded during their time in the biz, so that these ancient beauties seamlessly reach a ripe old age. In other words, they control the spiggot and don't want to sell out of their old stocks, just for the short term financial revenues. That's not how this works (and never has been) and it is the main reason we now have categories like Colheita ... so that younger Madeira can be released even before it becomes Frasqueira. It is also why they produce, and moreso, bottle so much 3, 5, 10 and 15 year old Madeira compared to true Vintage.
As to Soleras, that would make for a great book. But it would require a LOT of time nosing around in archives and speaking to current and past members of the trade. I don't believe we'll ever see that information released and not sure it exists anywhere except at the Adegas themselves. I for one, am always willing to enjoy a Solera as most of the oldies are pretty darn good and rarely have I heard ANYONE say that they can tell the difference between an older Solera and a true Vintage Madeira. Likely, back in the 1700's to early 1900's most of what we think of as Vintage Madeira, in some shape or form had a bit of other vintages in them anyway.
Peter will probably elaborate when time permits, but I hope this has been somewhat helpful and we look forward to you continuing to enjoy

and we look forward to your future participate. Nice to have you join us!
