From a text written by a DIR guy:
"Finally, the First Rule of Hogarthian diving is possibly the most important piece of wisdom in the diving world, and is something we should all apply to all of our diving. It is, simply, 'Don't dive with strokes.' The term 'stroke' refers to someone who, knowing there is a better system, chooses to dive in a less than optimal way. It applies to those instructors who encourage students (who know no better) to exercise Personal Preference, in order to sell more equipment; it applies to those who don't plan their dives; those who dive beyond their abilities; who dive deep on air; who take unnecessary risks; who do big dives using unfamiliar gear; who's only reason for diving is depth"
According to some ideas in this text I am a stroke. Of course I plan my dives, I don't take unnecessary risks, depth is not my only reason for diving ... but I do believe in Personal Preference (what works for me or suits me, might not work or suit you), and according to the DIR standards I dive deep on air.
Also, in what concerns the statement "someone who, knowing there is a better system, chooses to dive in a less than optimal way" when they mention better system, they mean the DIR/Halcyion rig - for instance my DR Transpac II is not DIR because it has 4 Drings and not three.
Does that makes us strokes under a DIR point of view? I believe so...