You are painting with some broad strokes here. I agree with your generalization, but generalizations can be very harmful if applied to individuals.

I can't tell you how many times I have met someone and vacillated whether I wanted to be with them long-term. And some of those unsure relationships grew into the deepest and healthiest love.

Not everyone falls into a deep seismic passion with someone in the first 90 days. Maybe you do. But some of us are a slow burn, and that doesn't mean the flame will be less hot.