I ride 2 Ti Cycles customs. They are a builder that has been around nearly as long as the two of that article. The primary builder there has been there the entire time and had a hand with every frame so he knows very well what works and what doesn't. He is also an engineer with serious machining skills. I suspect they have good sources to get quality raw material despite not turning out huge volumes as he has been doing this for so long. And they have had their hand in repairs a long time, both steel and ti. They get to see what doesn't work.
Ben