Miami Half Ironman 70.3 Results Analysis

The 2011 Miami half ironman event stands out among the 40+ others on the 70.3 race calendar for 3 reasons:
  1. The most registered entrants: 2,995
  2. The highest DNS (registered entrants that did not start the race): 29%
  3. One of the largest improvements in year-over-year average finish time: 29 minutes -- from 6:18 to 5:51
Given the relative speed of this year's race, it's also a little surprising that the DNF (did not finish) rate exceeded 6%. 

Of the 1982 triathletes who finished, here are the average times by age group.