Well, I have driven lots of automatic American cars and quite a few manuals and an auto will hands down hammer a manual into the ground.
An auto will kick down one, two or even three gears in the time it takes you to push your accelerator foot to the floor.
It will have changed gear and be accelerating by the time you start moving the manual gear lever wondering which gear would be best for the overtaking manoeuvre all the while the clutch is disengaged and the engine has dropped off to idle because you have lifted off the accelerator as well.
As for getting off the line, hold the auto against the brake, load up the torque convertor, lift brake foot, stomp accelerator foot....and you are gone. If you haven't gone, you are spinning the tyres, so lift accelerator, let the tyres hook up, press again.
In a manual, build revs, are they enough to avoid a bog when the clutch comes out, not sure, give it some more, step off clutch, bang, what happened there?
In a manual, build revs, are they enough to avoid a bog when the clutch comes out, not sure, give it some more, release clutch gently, slip, slip, clutch out, more revs, more revs, hang on need to change gear, clutch in, off accelerator, move lever, clutch out, back on accelerator... where's the other guy gone...