No wonder the percentage is that high, the 990 Pro performs extremely well. I doubt the average gamer has an SSD that fast, though. But, on the other hand, the SSD tested has hardware encryption support, so by default the user wouldn't notice anything regardless.
I'd be much more interested in benchmarks of common consumer SSDs in their standard configuration. Hopefully some tech outlet like LinusTechTips will test this at some point; they'd also be able to test real life video game performance, which would be a nice bonus.