I guess I am the only TAG Home lover here? Maybe not "quite" as buttery as ADW and LP but I really have no lag to speak of. Certainly quicker than Helix 1 in my experience. Reordering priority of how apps show in app tray (love this feature), screen nav buttons, transparency settings, NO FC (for me at least). The transparency settings (for me, again) completely make up for the theme-ability of the others that I don't much care about one way or the other anyway. I like to keep my system pretty slim.
Ive used both LauncherPro and ADW and I go with ADW. Just as smooth and fast but more customization.
I don't understand the "lag" some people say they see. ADW is just as fast as LP in my expierence. Used each for about a week. And you cant beat the app menu "pages" 5x6 in portrait and 8x3 in landscape.