No, it can't be as fast as chrome. I think the Minefield build is actually faster, though. Can't remember because I don't follow the browser wars anymore.
There are tweaks to FF, mostly centered around changing pipelining, I think. Just google and it will show you how to make the changes; you can use FasterFox, also, but I find it's better to adjust manually (so long as you keep down the original values so you can change it back later).