Yes and no. It depends on what aspects are being referred to, of course. For example, I've observed that a far more significant number of people from the past two generations seem less likely to hold any form of racial bias—something that was highly prevalent in older generations—although this is also highly dependent on cultural upbringing. Cultures that have been more effective at breaking down such barriers have progressed much faster than those that have not. Overall, I do agree with your thesis, though.