Not quite. Microsoft rarely develops the drivers that are used in Windows, in terms of all of the products that are released. The vast majority of the time, driver development is left up to the individual company (for example, Microsoft doesn't develop nVidia or ATI graphics drivers, nVidia and ATI do. Microsoft doesn't develop Intel or AMD chipset or processor drivers, Intel and AMD do).
Once a company develops a driver, there are a few options available: one, they can submit the driver to Microsoft for testing, in which case if it passes Microsoft's likely limited testing, it receives WHQL certification. If it doesn't pass testing, Microsoft will usually request that they go back and make changes to get the driver to function properly.
Otherwise, what often occurs, is that companies will instead directly release the driver onto their website, etc., and thus they take Microsoft out of the equation. Microsoft has for years warned Windows users that using any driver that hasn't passed certification, can lead to system instability. The ultimate reality however, is that so many thousands and thousands of Windows-related products get released each year, that it would essentially be almost impossible for Microsoft to ever provide the support Windows would need, to achieve OS X-like manufacturer-guaranteed stability.
However, that having been said, if you consider the entire scenario behind Windows and what it faces in terms of driver support, I doubt OS X or any other OS could ever approach the general stability that Windows provides, if you had to have OS X and other OS' support everything that Windows does.
OS X is a great OS, and I do think what of the greatest benefits is that in general, it is highly stable (although I've never seen my Windows-based systems ever crash more often than OS X, it's about the same, given that if you know what you're doing, Windows is very stable itself), and that for the average user, it does provide that almost guaranteed security that Windows cannot provide. I do wish however, that Apple would release a free, non-or-limited-support version of OS that us home system builders (one of my main reasons, besides gaming, for sticking with Windows primarily is that nothing is quite as fun as getting one's hand dirty with the building and upgrading of a PC. A lot like working on a car...) could use, because it would be quite a bit of fun, without having to resort to "hacking" OS X.