Google releases bug info in Windows 8.1 on schedule, two days before fix release

Synopsis: Google disclosed a bug with security implications to Microsoft. As per their policy, they released information to the public 90 days later. Microsoft wanted to wait a couple more days, and is now trying to paint Google as the bad guys for disclosing the flaw.

Two things bother me about this situation.

First, why did it take Microsoft more than 90 days to patch the bug? Especially since it potentially affects the security of their users. Do they actually care about their users?

Second, why are so many people getting on Google's case here (such as in the comments of the article)? Google notified Microsoft of the problem, and followed their own policy of disclosing the information to the public after 90 days. That seems like ample time for Microsoft to fix the issue. Also, Google sticking to their guns here is better for Microsoft users: maybe Microsoft will patch the next bug sooner.

After reading the article again, it states that Microsoft wanted to wait until a normal "patch Tuesday." If this bug has security implications, though, why would they wait for a normal release?