Hoser, if the theory is correct, you would want them out of the cello for aging so as to marry the flavors throughout the box. HOWEVER, there are caveats (as with everything).
For instance, take cigars En Tubos (In Tubes). These usually have a cedar sleeve within the tube which adds to the equation, but still, these cigars are just as good aged as their counterparts shipped in a box...JUST DIFFERENT. Now, like I said, the cedar certainly affects that as you end up with more cedar taste/aroma because of the sealed environment and close quarters, but the cigar still goes through the aging process as all of the individual leaves used meld together as essential oils are spread throughout the cigar. So there is still some aging, just in a slightly different manner. So with a box, you get all of the cigars evening out together, whereas with a tubo you get the individual cigar evening out the tobacco in that particular cigar. Hopefully I was able to communicate that well enough and it makes some sense.
Now for the other caveat: it depends on if we are talking about non-cuban cigars or cuban cigars, the aging process is again different between the two because of how they are manufactured. Historically, Cuba has used young, mostly un-aged tobacco to produce their cigars and they don't tend to hold on to the cigars for aging once rolled, they are shipped out pretty much right away. This means that the aging that the cigars go through is more drastic, and in some ways, more important, than that of rolled non-cuban cigars. Now, on the flip side, non-cuban cigars historically used well aged leaves to roll their cigars and many add to this a further aging step where the rolled cigars are aged before ever being shipped out into the distribution channel. This means that you will see a more pronounced aging process in Cuban cigars than you will in (most) non-cuban cigars (the most because I don't know that there aren't NC's being rolled with unaged tobacco).
So, to get back to your original question. I don't know how long it takes oils to spread honestly. When talking about Cubans and young leaf, the typical aging time-frame thrown around is about 5 years. Certainly people smoke them earlier, but that tends to be the benchmark for getting into "well-aged". For NC's, it's a much different story because the tobacco has already been aged for some period of time and it will depend how long the leaf was aged before rolling and how long the sticks were aged before being shipped. I know, not the most helpful answer in the world. :wink: