I agree. You can see the psychology of the same on this platform. People who continue to grind out here on a daily basis are the ones who are rewarded the most (with the exception of the very early adopters).
The more time and energy that people put into generating quality content, the more likely they are to be rewarded for their efforts. As you stated, it's not a "hard and fast rule" in any way, but if you average out experiences over time it's definitely a trend!