I've tried and it does speed up, not as twice but it's faster. I use webkit's nightly builds and turbokit helped. Mind you, I'm in a freshly installed leopard in a G4. Pity that there are not more versions, because it did work for me.
Looks like the 2x speedup is refuted by this page: http://www.turbokitproject.com/statistics.html on the developers site. Not to mention that WebKit nightly will smoke the pants off this. This will be obsolete before it can mature.
I'll happily recant if the developer reveals the modifications he's making and updates his outrageous claims. Additionally he'll need to make his source package available per the WebKit license. To the dev: why not just contribute to WebKit if you've developed a revolutionary performance advantage?
Marked 1 star to keep the naive users from downloading this until we know what it does.
Man... You're getting killed with these reviews.
One question before I try this out: What exact files are being changed? I need to know all of them so that if I don't like this I can restore them all from a backup.
In addition, the product website just reads like the marketing hype you get in spam emails - making wildly unrealistic claims ("twice as fast!") and providing no details on the actual functions of the product. No good!
Well, I'm going to give it whirl and see what it can do. Installation was smooth, and Safari appears snappier. Since the developer is making an effort, I will give them the benefit of the doubt and see where the road takes me. Life is short, at least there are those who are stretching the boundaries to where new paths lead before it ends.
This appears to use webkit. Whilst I use it as my main browser at the moment, the nightly builds are unstable. Does that not mean that this product is going to install an unstable framework for use with critical applications such as mail and safari? The stable code is safari so I don't see what benefit using the stable code would yield.