I think we need to emphasize more the "fledgling" part of the mead industry. Wineries can age a big Cab for 3 years before release because they're still selling wine they made 3, 5, or 8 years ago. For mead, there is no 8 years ago, and often not even a 3 years ago. There simply isn't opportunity to cellar mead before sale because something has to pay the rent, and that something is the mead that was made a few months ago.
This shouldn't always be true, eventually the production scale will match demand (and more meaderies will exist as well), margins will be healthy enough to provide for some cash reserves, and each individual meadery will have been around for more than a few years so they can actually reach back into the cellar and find mead there. See the Polish 25-year meads (which apparently are now 6-year meads due to demand): they've been at it for generations.
You worded this a lot better and explained some of what was in my head. Obviously to just start up and wait around for a year while things age is nuts, you'd have to have some crazy investors. But if you can get to the point where Brad says he is now, where he's making more than there is demand for, it might be possible to start aging 5 or 10% of each batch, to be sold as a private reserve version of their regular releases (wineries do this all the time from what I can tell).
I fully appreciate that this is impossible until you've reached a size where you're making really good money. Until then you'll obviously want to try to sell your stock as fast as possible, especially since the whole industry is so young and the demand so small.