I don't think pulling an update and working on a fix within a matter of days is slow to react. In such an industry where such updates aren't even pulled or such issues can be left out there for a long time until another update, this doesn't really seem slow. Sure, there's something to be said about hopefully not even having some of these issues to begin with, but that's a slightly different aspect of it all.
Let's be honest, they should have pulled it day 1.