I think everyone is missing the real point of this study, which is buried in the middle of the article:
"It's likely that speciation takes place over a longer time interval than extinction," Barnosky said. "So, climate changes like the global warming we are seeing today are probably happening too fast to cause anything but extinction."
There you have it. Global warming is a fact, and it is going to cause massive extinction. (And of course it's all George Bush's fault.)
"adaptation" versus "evolution" no sting in either word if they are defined in what they mean.
The "stretch" that some use to make each word cover what one believes has lost its elasticity. A "theory" is not scientific data, rather what some use to explain the data, their own interpretation.
Fact this "earth" is more than "six thousand" years old.