Hmm, I think the throw depends a lot on the temperature, humidity, air flow, where you wear your perfume, etc. What I do know is that sprays tend to diffuse over a wider area than roll-on perfume. I'd guess that across a normal table you'd be fine with roll-on, especially using some spray on your hair, too! Just because he couldn't recognise that he was smelling your perfume doesn't necessarily mean he didn't. It could just be that it was subtle (a good thing). I'd be interested to hear about others' experiences with phero diffusion areas, too!