The article isn't super clear, but I think what it's saying is that the data recovery method they were testing (when looking at recovering a single bit) was as

The article isn't super clear, but I think what it's saying is that the data recovery method they were testing (when looking at recovering a single bit) was as good as 92%, and as bad as 32%, depending on how the data was overwritten and other factors like the specific drive. Thus you likely can't just flip the result to get better odds because in a real scenario you wouldn't know which category you fall into (whether it's really good, or really bad), and overall if you don't know that information then the odds are close to 50%. Edit: And of course even a high of 92% is abysmal for a single bit, since the combined odds of multiple bits quickly goes to zero for any sizable amount of data.