Good news, bad news about the age thing:
It seems like there are a couple of patterns of etiology. For me, white male, onset at 22 years old, 3-4 years before diagnosis, episodic (every two years), some help with conventional meds (Verap), great experience with O2 as an abortive. Pretty typical, I think. I am 51 years old and have shifted to chronic daily shadows. Only a Kip2, but almost every day. Like that old feeling of suddenly realizing you HAVE to get to the Oxygen, but just as you expect it to explode in intensity, it simply does not. Watery eye and nasal congestion on that side.
Interestingly, my 93 year old uncle through marriage is a Clusterhead. I only found this out almost exactly a year ago at my Dad's funeral. Sam's kid was talking about him getting these horrible headaches where he isolates, rolls around the floor, breaks things, and has a huge Oxygen tank in the bedroom...Yep, that sounds about right. I am going to try to ask him about his history. Let me know if you have specific questions.
See you in the Windy City
Larry