Concerning flashing lights being more noticeable, that is true if all else is equal. But around here most of the flashing headlights are the ones that run off of a couple of AAA batteries. A real headlight you can see with is going to be way brighter and more noticeable than that in steady mode.

Also again distance is going to be easier to perceive. I once had an oncoming driver flash his hi-beams at me to let me know someone was pulling out of a drive-way ahead of me (that I couldn't see that well from my angle). Don't know if the driver would have seen what was going on if I had a blinking light.

My lights are bright enough that I get the, "woh I thought that was a motorcycle" comment from bystanders (or just smiles). But on my other bike I have one of those AAA blinkies and that goes in flashing mode, because it's just a dot of light to be seen by.