I said they may have found a bound. I didn't say it was; it said there may be a limit. Re-read the ancestor.
The point is that there's really not much difference between 10% and 9.56%.
Netflix's Grand Prize could very well had been 9.64% and it would already had been won, despite everybody saying one year ago that 9.64% might be impossible given the dataset.
We will talk again in one year to see if 10% may be impossible.