If I take firefox, and use the web developer plugin to disable all CSS support, thus making it a better comparative match for IBrowse, it whizzes all over it in performance terms.
This is, of course, simply down to the fact that my "Pee Cee" has massively more horsepower to do *anything* than my Amiga does. If this is going to become another one of those "why my 060 amiga is so much faster than a modern PC" thread, I am just going to have to reiterate the fact that this view is delusional.