Standard fudge words that they always use.
As usual, they attempt to tie the nonexistant evolution to something, but cannot do so in a definative way because evolution is, like all flights of fancy, undefinable.
http://www.answersingenesis.org/articles/nab/human-and-dino-fossils-together:
We find human fossils in layers that most creationists consider post-Flood. Most of these were probably buried after the Flood and after the scattering of humans from Babel. ...
In light of this, it is possible that human fossils from the Flood could still exist but just havent been found yet. ...
Although they wouldnt have lasted that long and would have eventually perished, they might not fossilize. ...
It seems doubtful that there were many hundreds of millions of people before the Flood. ...
John Woodmorappes studies indicate that there are about 168 million cubic miles (700 km3) of Flood sediment.6 John Morris estimates that there is about 350 million cubic miles of Flood sediment.7 The latter may be high because the total volume of water on the earth is estimated at about 332.5 million cubic miles, according to the U.S. Geological Survey. ... It also may simply be that we havent found the sediment where humans were living and were buried.
Much more fudge where that came from!