This article from the American Psychological Association discusses one way that ADHD seems to be related to timing, and helps explain why IM is so beneficial for individuals with ADHD . A quote, "People with ADHD do in fact have a rhythm cut-off that is faster in tempo than those without ADHD..., essentially recalibrating the clock that sets the time scale for the subjective experience of temporal events." Temporal is the term often used in scientific journals meaning - relating to time.
