They review on the order of 10,000 apps a week.
They say that 95% of apps get approved within one week. That means that about 500 apps a week are rejected for various reasons.
I'm not sure your math is correct. Just because Apple says that 95% of apps get approved within one week doesn't specifically mean that it's 95% of all the apps submitted. As far as I can tell, the only fact that statement shows is that 95% of all the approved apps are approved within one week; the number of approved apps could be 25%, 50%, 75%, or even 99% of the submitted apps.
...making our products more secure than anyone else...
It's easy to be the best at these things when you're playing catch-up to everyone else.
Fox News reported that Wikimedia is "in chaos"
Hello, pot; it's me, kettle!
"God is a comedian playing to an audience too afraid to laugh." - Voltaire