Crash Reports not being sent to Apple
Kris,
You do not get all the crash reports on iTunesConnect.
This is how it works:
Lets say you are an iPhone user, when you first activate your iPhone, it asks you if you'd like to send anonymous reports to apple, if you checkmark yes, only then the crash reports from your phone would be sent to apple.Another thing to keep in mind is, even if a person has checkmarked this option, these reports would be sent, only when the user syncs his iOS device with the iTunes.
So essentially, the answer is
You cannot rely on iTunesConnect to get your app's crash reports
Instead you should use a third party solution, like: Hoptoad:
I am very sure that there are other solutions like hoptoad as well, but this is what I have used and works very well.