- The athlete's improvement does not appear to be incremental; a big improvement happens suddenly (to the outside observer)
- The athlete dominates competitors who were previously equals; there is a notable shift of power at their current level (high school, NCAA, juniors, etc)
- The improvement is sustained, as evidenced by improved consistency and numerous performances over time
- For levels below the world elite, the athlete's performances are equivalent to top athletes at the next level and/or GOAT status for their current level
Last year, I counted six people who made the leap. I've posted a new article up at Runner's Tribe that covers last year's leapers, as well as some thoughts about who seems poised to make the leap this year. Let me know in the comments who you think is poised to make the leap!