That's been happening for a while now. My understanding is that there was a major wall many go AIs were stuck on prior to the invention of monte carlo tree search (essentially, a way of evaluating a better play objective function) and they're improving now again. There appears to be reticence to evaluate the strength of go programs, though.

Here's a chart of current ratings of popular engines on online forums. The rating system is one of "kyu" and "dan" going from 25k to 1k to 1d to 9d.

http://senseis.xmp.net/?KGSBotRatings

Informally there's another rating system the "pro" rating system which is a bit ceremonial but also broadly assumed to be often higher than the amateur dan rankings.

There was a huge improvement in the period of roughly 2005 through a few years ago, at which point programs seemed to be making only slow, incremental progress. At the current rate, it looks like we're talking at least a decade to reach full professional status.

I guess Facebook is claiming they're upending that, but that remains to be seen.