Early to Bed, Early to Rise, Makes a Man Healthy

They did a research study at the London school of economics that suggests people who stay up late and sleep in late tend to have higher IQ scores than people who go to bed and get up at more reasonable times. I'm going to use that the next time someone tells me off for sleeping in. Of course, they also found that those same people are more likely to have unhealthy vices and addictions and are more prone to depression and anxiety, but I'm not sure if that's because of the odd sleeping patterns or the high IQ's.