Hundreds of thousands?
Yes, even more. I think they stopped counting a few years back, of course they count mal-ware, spy-ware, extortion ware, and viruses all together.
I couldn't keep up with it anymore and was so sick of fixing other peoples computers that were infected, I gave up. drank the kool-aid and went over to the dark side and bought a new iMac. Best decision of my life. I won't even beta test the new win 8, and if I need Windows, I can alway bootcamp it.
There hasn't been hundreds of thousands of windows exploits.
Your comment about beta testing windows is funny though... I am apple certified and even on the courses they freely admit things are broken on osx, but won't be fixed until the next version. Osx server is even worse.