There tends to be a lot of myths about Microsoft security particularly in the non-Windows using community. The fact of the matter is that Microsoft tends to be very good about security updates, disclosure of bugs and holes, and remains vigilant about finding and patching up unknown flaws. Additionally, Microsoft hasn't had to answer before Congress on the matter of the securing their user's data. So trying to compare Microsoft's apparently "embarassing security failures" to Dropbox having to testify to Congress is like comparing your post to a PG essay.
I happen to use 7 / archlinux / Os X almost equally. Of course my comment was trollesque, but an affirmation like "Microsoft ... tends to be very good about security updates" is not realistic. Time elapsed between exploit discovery and patch proposal to the user is everything but short. And If every website with a security issue was to answer to the congress, well it would not do much else. Plus, given the money Microsoft spend lobbying, I doubt very much that in a similar situation they would have to answer to the congress. Dropbox just seems to be a marked man.
Yes there is a time between discovery and patching but if you look at their competitors, Windows is much farther ahead in the security realm. Microsoft's whole security cycle is better defined and IT managers have a much easier time managing security updates from Microsoft than anyone else.
Dropbox isn't a marked man because it doesn't have the capital of Microsoft, they've had to testify because they have a serious security and privacy problem.
"if you look at their competitors, Windows is much farther ahead in the security realm" and that of course is not heresay but solid facts. If you exclude linux, bsd distros, and solaris of the "competitors", then you may be right. So far most of the securty / pen tests reports I have read (and my personal experience demonstrate) that it is way more easy to penetrate a Windows system than a unix / linux one. I like this sentence "There tends to be a lot of myths about Microsoft security particularly in the non-Windows using community" because the symetry is interesting: most non-unix/linux fail to see that these systems are usually more secure. I have used both kinds for 10 years and had much more security problems with Microsoft (which does not mean that I have stopped using it). I do not believe I am the exception.
