Few comments are about the solving because few commenters are actually cubers. If you look at discussions of this on actual cubing forums, then you'll see that

Few comments are about the solving because few commenters are actually cubers. If you look at discussions of this on actual cubing forums, then you'll see that the differences between competitors are actually significant. Edit: As a direct example of competitors making mistakes, Etter's 4.9s solve could actually have been trivially improved if he had done a U instead of U' U' U' on the 2nd pair.