I emphasized the important part, so I would have serious reservations about running it and expecting it to perform as well as the Linux variants (which is what most people talk about being a higher performer).
I used it a few years ago to run a site on windows. Performance was excellent, fair bit faster than apache or IIS (though this was server 2003, so older IIS)
Given the way it handles connections it probably gets exponentially slower under load, but under light load (eg 10 req/s) it's grand