Because if u read the report that I linked to it is apparent she is not in freefall and actually remained in part of the fuselage for the descent
The 8 mins is rather an undefined figure but one assumes from time of impact or time of acft break up with the debris/fuselage section making a slower descent than a freefalling person - only to then have to wait 3 days for rescue...
All quite clear in the St. Petersburg Times article