This is hardly the first time that people CLAIM that Apple sweeps security issues under the rug etc.
You know as little or as much as anybody....
Nope. There is plenty of info out there, if you know how to do a basic search.
Here is a chart of OS vulnerabilities in 2014. Note that Apple and iOS are right up at the top.
http://www.gfi.com/blog/most-vulnerable-operating-systems-and-applications-in-2014/
Here is more:
Google gives Apple and Microsoft an ultimatum: 'Patch your software vulnerabilities, or we'll make them public'
This has been going on for years -- this is from 2008:
"Apple was widely skewered for being among the last to fix a gaping security hole in the net's address lookup system that could allow the wholesale hijacking of users' internet connections. And now that the company has finally got around to issuing a patch, there's just one problem: it doesn't work on client versions of Mac OS X."
Cheers.