It's probably the JavaScript. I'm obviously horribly biased, but Camino is based on 3.0.19, and 3.0's JS compared to even 3.6 is about half again as slow. The ads are undoubtedly contributing because -based ads can use JavaScript too. Camino does have AdBlock, so that's one thing to see if it helps.
If you want to stick with Camino instead of Firefox 3.6, get the 2.1 alpha and see if that is better. 2.1b is based on 3.6.17, IIRC, so you get the same renderer but the browser chrome is still native. But, it's an alpha.
Although TenFourFox will do very well with the JavaScript, 768MB is probably a bit on the low end for it. However, you could see how well the 7400 version performs, for gits and shiggles.
If you want to stick with Camino instead of Firefox 3.6, get the 2.1 alpha and see if that is better. 2.1b is based on 3.6.17, IIRC, so you get the same renderer but the browser chrome is still native. But, it's an alpha.
Although TenFourFox will do very well with the JavaScript, 768MB is probably a bit on the low end for it. However, you could see how well the 7400 version performs, for gits and shiggles.