More than I'd care to admit... but I have found a distinct difference based on the case I am using at the time. I took considerably fewer with the Ghostek case than the one I'm using now.
Yes, that's a screenshot from yesterday on my Icon using the "Upgrade Advisor" app. Unfortunately this is what I see when I try today (does not look promising):
I have the Trident Cyclopes case for my phone. It is quite good for protection and has a built-in screen protector just like the Otterbox. I had the Otterbox Defender case on my 822 previously and it was a great case too.