I mean there was a lot of information within the Whizlab questions and the explanations to the answers that I had not gathered from the acloud.guru material and the AWS FAQs.
I rushed through the exam, wanting to get finished and to another appointment. I was focused on a pass and not worried about the score. I think I could easily have hit the mid 90% if I'd taken another day to prepare, and spent the full 80 minutes taking the exam.
That said, I'm pretty certain that the Whizlabs material is easily responsible for 10% or better of my result.
Meaning, I feel that Whizlabs gave me a good 5, 6 or 7 correct answers that I wouldn't have had from the other material alone.