Interesting question about the blog came in private e-mail from someone who wishes to remain nameless.
"You state that a lot of people have had the abyss experience. Does this mean that you think lots of people have attained K&C of their HGA as well? It stands to reason, that an experience that happens in Tiphareth would have to occur before an experience in Daath"
My answer is no. I do not think as many people have attained the K&C of the HGA as have "crossed the abyss". Just for clarification I do not people that have stabilized their trans-abyssal consciousness. I mean merely those that have had the experience itself. Sort of like visiting Spain, but not moving there.
One is not dependent upon the other. The K&C of the HGA is very specific to certain systems of magick. The "abyss experience" is a lot more universal to mystics and magicians the world over. In my own experience the HGA is harder to attain, but easier to stabilize. The Abyss is easier to attain, but much harder to stabilize.
Note that Crowley seems to have picked up on this stating that one could take the Oath of the Abyss even as a beginner.
If you are following a graduated system based upon the tree like that of the GD and AA than yes you should attain the K&C of the HGA first, but that doesnt mean that it must be done that way in all cases.
Don't forget that the menu is not the meal.