Ask HN: female being perceived as less convincing on tech subjects?

Let's say you don't know the lady you are talking with and she starts sharing her opinion on technical things like car, tech, tools. What's your first reaction to such within say...first 5 min into conversation?

What I really want to ask is: To people who know lots about car and tech savvy, when a new idea is being talked about, do you prefer a guy or a girl talking about it?

To put it in context: we are making a short video for target audience who are mostly car guys. We wonder which narrative voice we should go for.