I was very disappointed with my bottle conditioned beer at the last meet up and its inability to travel. Personally I wont be moving conditioned beer again- any beer I am moving will be from the keg with the beer gun.
This is an interesting topic, I am just reading that chapter in the Yeast book by Chris White -
"Usually breweries filter the beer first, then add 1 million cells per milliliter back to the beer" .. "after the yeast has settled out in the bottle, it should look like no maore than a dusting of yeast across the bottom"
I know SNPA filter first, as does fullers with their conditioned beer also most german beers are filtered and then a larger yeast is used for conditing - all this means they can control the yeast level. Come to think of it I Dont know a beer that is naturally conditioned without filtering like this (but I am sure there are loads)
There is a nice authenticity to not filtering and naturally conditioning beer, but it seems like the inability to control the yeast level makes is too risky commerical brewing.
James