Thanks. I will look forward to researching this more in depth the next chance I have of obtaining the journal article. From the summary, though, I would suggests this is not really a measure of an organism's "evolution", but of it's short-term adaptability to a controlled change in it's environment. It will be interesting to read whether they demonstrated any long term changes, or if the organism reverted back after the environment equalized back to normal.
What on earth do you think evolution is?
This is what evolution is. There is no other definition used by biologists.