I think Opera is faster than IE in page rendering. I've seen statistics on this (don't have an url to back it up, so take it with a pinch of salt
) proving that Opera is the fastest.
Keyboard Shortcuts are 100% user configurable. Of course
Opera has built in blocking, and although it's not automatic ala Firefox' AdBlocker it's good. And there are user scripts and user css files that automatically blocks ads.
I agree on the firefox plugins! Love apps with plugins/extensions/modules. The best way to keep a small and/or basic core with user deciding what else to add. On that note though, Opera can take user scripts (even most Firefox Greasemonkey scripts) which makes the little difference sometimes.
about the mail-client and torrent-client... well, I sorta agree. I use the M2 client myself (Opera's built in) which is the closest I've come to the mail-client I want (I've tried tons...). I don't use the torrent client, and don't notice it, since it's disabled. Don't think it affects the general speed of Opera, either...
Sorry to topic starter for stealing the thread, btw...