Can Someone Explain This?

From the Daily Dish:

When 16-year-old Chinese swimmer Ye Shiwen won 400-meter individual medley on Saturday, she set world record by swimming the final 50 meters in 28.93 seconds. Ryan Lochte, who won the men’s event that same day, swam it in 29.10. Apparently, some people questioned how a teenage girl outswam the fastest man and broke a world record without the aid of the special water-slicing swimsuits that were banned after 2008, but we’ll just admire the feat for what it was.