Apple has released a press release stating that Safari 4 has been downloaded over 11 million times in just 3 days.
Breaking these down, there were 6 million downloads for Windows and 5 million downloads for Mac OS X.
To compare, Firefox 3 was downloaded 20 million times in 7 days, so the numbers from Apple seem quite reasonable.
Apple claims that Safari 4 is “nearly eight times faster than IE 8 and more than four times faster than Firefox 3. Safari quickly loads HTML web pages more than three times faster than IE 8 and three times faster than Firefox 3”.
Safari 4 can be downloaded for Windows and Mac from the Apple Safari website.