The hole in the floor of the Gulf of Mexico: from thing that killed the Dinosaurs, or 300k years later?

Dinosaur impact theory challenged By Paul Rincon BBC News Online science staff
"The controversy over what killed the dinosaurs may run and run Scientists have cast doubt on the well-established theory that a single, massive asteroid strike killed off the dinosaurs 65 million years ago. New data suggests the Chicxulub crater in Mexico, supposedly created by the collision, predates the extinction of the dinosaurs by about 300,000 years."
BUT... according to scientists on All Things Considered ... the paper isn't well considered, and the author's proof just doesn't prove her point. Read the paper, and see what you think. I guess the controversy isn't solved after all.