NIT2WIN,
I would venture to guess that the results may have had something to do with the race being called early.
It's been my observation that most racers will feel out what the rest of the field is doing...In other words, in an effort to try not to blow something up, a little conservatism might come into play up until the final laps. After all, there's no sense in trying to blow away the competition only to break something early and have the others easily walk past a sitting duck.