Apple said Safari 4 was downloaded more than 11 million times in its first three days of being available. Eleven million is certainly a strong number for the browser, but what’s even more interesting is that six million of those downloads were from Windows users. It seems clear that despite the choices available for Windows users, they continue to be dissatisfied.

Of the features in Safari 4, Apple boasts speed as one of its main advantages. Apple says the new Nitro JavaScript engine that executes JavaScript nearly eight times faster than IE 8 and more than four times faster than Firefox 3. Add to that its ability to load HTML pages three times as fast as Internet Explorer 8 and Firefox and you get an idea of why so many people are downloading it.

Safari includes many features over its predecessor, including Top Sites, Cover Flow and the ability to search your history.

Safari 4 is a free download from Apple’s Web site.