Yes, because the keys on the keyboard are offset just slightly to the left, so it's easier to hit them by curling your left hand inward, than reaching up and to the right. Nothing+ beats an angled ortholinear keyboard though.
+ Except specially-designed ergonomic keyboards of course, but if you need one you'll know.
Exactly, standard keyboards are pretty bad for your left hand because of the way the keys are typically offset, so even if you hit different keys to the "standard" with your left hand things are shaped poorly.
Do people actually type like that? My hand ends up in a very awkward position if I try to hit X (in qwerty, Q in dvorak) with my ring finger while it's trivial with my middle finger. Actually it's pretty funny because in the illustration above it does look like the hands are sprouting from somebody's chest!