I dont have a mac so I cant really experience it first hand, but the windows release of Safari made me get my first experience.
This weekend, I was surfing net when I came across "webkit". Reading a bit more about it informed me -
Well, I didnt had to look much further... search produced this link...
However, my first attempt at compilation failed, due to lack of one of the packages. libxt-dev
So, now the list of pacakges that should be installed on hardy to compile webkit would look like this :
sudo apt-get install autoconf automake libtool bison flex gperf libicu-dev libxslt-dev libcurl4-openssl-dev libsqlite3-dev libjpeg62-dev libpng12-dev libglibmm-2.4-dev libgtk2.0-dev build-essential libxt-dev
The sample browser, gives me 98 on acid3 (acid3.acidtests.org). Though very minimalistic in capabilities, this is the best score for acid3 that I could get on my system.
Here are my scores
Firefox 3 beta 5 : 71
Flock : 51
Opera 9.5 beta 2 : 78
Midori (webkit based) : 64
Webkit minimal browser (nightly build r32862 ) 98
On my windows partition as well, none of the browsers went beyong 70's. Best being opera at 71.