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.
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.
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.