Here is the abstract:
Previous research has suggested that adults with ADHD perform better on some measures of creativity than non-ADHD adults. The present study replicated previous findings using a standardized measure of creativity (the Abbreviated Torrance Test for Adults, Goff & Torrance, 2002) and extended previous research by investigating real-world creative achievement among adults with ADHD. Results indicated that adults with ADHD showed higher levels of original creative thinking on the verbal task of the ATTA and higher levels of real-world creative achievement, compared to adults without ADHD. In addition, comparison of creative styles using the FourSight Thinking Profile (Puccio 2002) found that preference for idea generation was higher among ADHD participants, whereas preference for problem clarification and idea development was greater among non-ADHD participants. These findings have implications for real-world application of the creative styles of adults with and without ADHD.
It's also worth repeating the more general point that many (most?) ADHD individuals have a high variance of focus abilities, not a complete inability to focus on something. They can be some of the world's best focusers, under the right circumstances.