CNET Says Safari 4.0 Really Is Mad Fast
"We determined on a PC that Safari was a whopping 42 times faster than Internet Explorer 7, just over six times faster than Internet Explorer 8, 3.5 times faster than Firefox 3, and 1.2 times faster than Google Chrome... On Mac OS X, Safari was four times faster than Firefox 3 and a depressing (for Opera) 7.5 times faster than Opera 9."
Safari 4.0 is pretty darned fast. I've been very impressed with it since I started using it. In fact, it's my default browser both on Mac OS and in Windows. I know some people have reported stability issues, but I haven't had anything of the sort. What made me make it my default browser was the speed, and frankly once you get past the really long startup time (it does take longer than Firefox or IE to startup) it's just blazing fast.
Current Apple Stuff: 24" iMac, iPhone 4, AppleTV (original), 4gb Shuffle, 64gb iPad 2.