I'd say some of the top stock producers have done so much of it for so long, that it's hard for them to even perceive 'stockiness', it's like snow to Eskimos. And buyers saying they want photos that look 'real' - they think they're serious, but what they really want is just different sorts of posing and staging. This isn't really a putdown. Stock is a genre, these people have worked in it for years and internalized it and learned how to see and photograph in a certain way.