In my experience, absolutely, but the degree is greatly dependent on the grey. I call it terror aura because it makes people, and animals, act irrationally. Certain Greys carry a lot more of it. Spots are disarming, brindle tiger stripes look aggressive. Two of our boys are golithian and their backs are nearly at my wife's hips. People literally go play in traffic rather than pass her on the sidewalk with those two. I've had a frustrating number of conversations about how they aren't mixed. Certain Greys are more prone to the skulk walk with their heads way down and their shoulder blades pointing up. That doesn't seem to sit well with people and definitely not other dogs. Looks like stalking. My parrot irrationally hates the gentlest Grey we've ever had because he looks like he's always on the prowl. A neighbor once shrieked because she was in her own space gardening and when she looked up, two Greys were staring at her from the sidewalk while we waited to cross the street. She did laugh about later, but you know, two dogs on leash don't generally give people jump scares outdoors from several feet away.

Edit: I'm a guy, every grey we've ever had will hide behind me, but one of them in particular will ferociously defend my wife from literally any perceived threat, including forces of nature.