As an IT professional of many years, I've seen many changes in email and filtering tools to know when there is an issue.
What we are currently receiving should be blocked by any filtering solution. Yes, there is always going to be some that gets through, but the current levels reported by many people are not normal and there is obviously an issue. I don't see my work gMail account flooded with this stuff and even an old hotmail account is not seeing this level of rubbish come through.