Flash Player update came in for MSIE before it came in for Google Chrome
In Canada, at least on my computers, the Flash Player update came in for MSIE before it came in for Google Chrome. The update didn't come a day later, after I sent a complaint email to Google.
However, I've worked in very large companies and usually they can't do anything in less than 2 months.
And MS has it even worse because of the vast number of companies whose products need to be integration tested and potentially modified when MS makes a change.
Witness Kaspersky complaining about how little time MS gave it for integration testing.
It seems a shame that inexperienced non-programmer types with no regard for the organizational complexities of an operating system can reduce reliability for all of us by setting unrealistic deadlines for programming professionals.
If the software maker seems to be ignoring you, formally disclose to your country's CERT. If your country's reports back that it is being ignored and that you should do a full disclosure, then do the full disclosure. Anything less is worse than being an ambulance chasing lawyer. (Ambulance chasing lawyers don't create clients by pushing people under buses.)