Petr is no longer ranked #1 on popular competitive programming sites such as Topcoder [1] and Codesforce [2]. 18-year-old Gennady Korotkevich [3] from Belarus ranks better on both, and has also won the most medals in the International Olympiad in Informatics ever, he was awarded his first silver medal when he was 11.
Nonetheless, Petr is a legend in this field.
[1]: http://community.topcoder.com/tc?module=AlgoRank