The recipes for absinthe, and thus the flavor, vary greatly from manufacturer to manufacturer, as was true at the turn of the century when there were over 200 absinthe producers. Today, there are not nearly so many, but more and more crop up every day! That said, a few of the modern Spanish brands seem to have the best hold on flavor.
Actually, that is very true. OS disks should ALWAYS be burned at the slowest speed to ensure the critical data is not corrupted from disk wobble (causes from high speed revolutions). I burn CD-ISO's at 4x and DVD-ISO's at 1x. And about 1x not being supported by any current drive..well..ot exactly true for DVDs, media rated for higher speeds don't like being burned at too low speeds, also you can't burn at 1x as that is not supported by any current drive, the lowest speed for DVD is 4x. You shouldn't be so concerned about speed, more important is the brand of the media you are burning on.
Of course, one of the simplest but also most expensive ways to increase your copying and burning speeds is to purchase a DVD writer and DVD media that function at higher speeds. Different DVD writer drives function at different speeds, and the fastest DVD writer drives are able to write at speeds of up to 22X. This is extremely fast and will allow you to read and burn your DVDs in no time at all.