I qualified it with "reliably". Major bugs reported by you, a security researcher, may be bucketed differently than those deemed less serious or filed by others. As a recent example, a minor bug like the iOS 11 calculator ignoring keypresses had reports filed since Beta 1, but only after it made headlines and caused Apple public embarrassment will it be addressed in the upcoming 11.2, six months later.

Sorry. 45 days is not quick.