I think we are in agreement CHS, there are a lot of really bad painful things out there that can hurt us, but Clusters tend to top them all.
And even though everyone has different pain thresholds, Clusters still come out on top and often by a considerable distance.
I also agree that this is an important message to get across to people who don't have clusters, it's the vagueness of the wording that bothers me, and how it doesn't convey a complete picture of the Hell that comes with clusters.
Try this scenario on for size.
Let's suppose I'm an Astronomer, and I publish a discovery I just made, which is: 'Astronomers have just discovered the largest galaxy known to mankind. In fact, it is 4 times the size of the Andromeda Galaxy.'
Now, as a non-astronomer reading that, I would think they found a pretty big circle of stars. But I have no concept at all how big the biggest galaxy is, or even how big the Andromeda Galaxy is. So the information doesn't really mean a lot to me. OK, it's the biggest. Cool.
But, if they were to say, 'our galaxy is approx. 120,000 light years across, and Andromeda is 260,000 light years across - and this new galaxy is 4 times that big! It's 1,040,000 light years across!!' - now they are starting to put the size of the galaxy into some perspective. OK, I can't really grasp the distance of a light year, but I know it's a far bit. A quick Google search says it's about 5.9 trillion miles. It doesn't take much brain power for me to work out that I could line 8 Milky Ways up in a row, place them on top of this new fictional galaxy, and they still wouldn't touch the edges. NOW THAT'S BIG!
Relating one person's pain to another person's pain is very difficult to do. We all experience pain differently and there is no level playing field. So trying to convey how painful a cluster attack is, is very difficult. But I don't think putting a vague statement out there is the best way of doing it. Especially when having the condition of cluster headaches involves so much more than just the pain.
Just my 2 cents. Not trying to change the world.
MG