Still not macroevolution
Pretty simple really.
Microevolution X 3 billion = macroevolution.
According to the article, the mutants are a new species:
"It's the most profound change we have seen during the experiment. This was clearly something quite different for them, and it's outside what was normally considered the bounds of E. coli as a species, which makes it especially interesting," says Lenski.
That makes it Macroevolution.