With more information, like why or how they got an MS, the probability distribution changes. My impression is, there's a set of dimwits from a dimwit part of the industry that decide they should get a Master's in order to better their career. As opposed to, say, getting one right after school because you didn't want to enter the real world, or because a 5-year MS seemed like a good idea, or being brainwashed in general about the value of formal schooling.