Good for you for managing to not scare someone off with all grain while sharing the hobby for the first time. I tend to babble on about all I know when I'm showing someone how to brew, and I can get into the nitty gritty nerdy aspects of the science that I've picked up along the way ('cause I like that stuff) and I think that kinda scares some people I know off.
But then again these are other people my age that are just more interested in the fact that I have gallons of beer sitting around and wanna have that too.... not so much interest in the craft, as your friend must have been. If you do have a convert, good job!
Courage les garçons, et patience, vos femmes vont finir par apprécier la bière !