From a security blog earlier in the week, the MS Tuesday Patch included...
"...six security patches, four of them considered 'critical' for Windows 8, and Surface-ready Windows RT operating systems."
If only linux could do what my wife needs I could and would switch over completely for desktop work. :(
As it is, my three linux machines - two Ubuntu Lucid and (now) one Mint Maya - are causing me no security headaches at all.
Incidentally - Mint's updater has an option to go down to hours and minutes - no idea if there is an actual minimum refresh period but even a few hours should be far better than the once a month MS.
And there are ways of adding third party updates into linux repositories as well, which there isn't in MS - witness the hassle over Adobe updates!