When I first saw this reported, I assumed it was a negligible difference, maybe an inch or something. 9" is a pretty big error in distance. It's very visibly obvious. Surprised it took until a 5th game to be detected.
www.espn.com
In reality, it didn't seem to make much of a difference:
www.cbssports.com
NCAA: 3-point line in Portland 9 inches short
One of the 3-point lines on the court used for the women's basketball regionals at Moda Center in Portland, Oregon was 9 inches short of regulation at its apex.
www.espn.com
In reality, it didn't seem to make much of a difference:
Uneven 3-point lines in NCAA Women's Tournament: Officials say Portland court wrongly measured for five games
The error was discovered before Texas and NC State met in the Elite Eight, but they agreed to play the game to avoid a delay
www.cbssports.com