They would have extended an offer or not independently of your salary demands. The question you asked would have been a minor point in the debrief if it was discussed at all. If you didn't get an offer it is probably because you didn't "meet the bar".
I obviously didn't "meet the bar", but it's not obvious to me which bar I missed.
In my estimation I clobbered the phone tech screen. I clobbered all of their board work except the first early morning one. I did sort of muddle through that one. I got through it, but not with all that much glitter and glam.
I don't think I interviewed like a madman sociopath, but subjective things like personality are the hardest things for me to defend my performance in ;)