from a longer article in WSJ
And this lesson doesn't just apply to people with a full-fledged disorder. A few years ago, scientists at the University of Toronto and Harvard gave a short mental test to 86 Harvard undergraduates. The test was designed to measure their ability to ignore irrelevant stimuli, such as the air-conditioner humming in the background or the conversation taking place nearby. This skill is typically seen as an essential component of productivity, since it keeps people from getting distracted by extraneous information.
Here's where the data get interesting: Those undergrads who had a tougher time ignoring unrelated stuff were also seven times more likely to be rated as "eminent creative achievers" based on their previous accomplishments. (The association was particularly strong among distractible students with high IQs.) [emphasis added]
According to the scientists, the inability to focus helps ensure a richer mixture of thoughts in consciousness. Because these people struggled to filter the world, they ended up letting everything in. They couldn't help but be open-minded.