Even if this were true, which I doubt, it would be Micro Evolution, and nobody denies that, not Macro Evolution of which there is no proof what so ever.
When I was a creationist, eventually I admitted that “microevolution” could happen. I figured that changes could happen within species, but it could never turn into a new species.
The problem is, as Carl Zimmer once said, “If you accept microevolution, you get macroevolution for free.” Macroevolution is just microevolution over time. Eventually, enough genetic and/or geographical drift occurs that they become new species — organisms that no longer breed with one another.
So if you believe in microevolution: Congratulations! You’re almost there!
http://unreasonablefaith.com/2008/08/12/microevolution/