[gadrfgaesgysd]

That layout goes against usual touch typing rules.

https://upload.wikimedia.org/wikipedia/commons/thumb/2/29/To...

As you can see the rule for the left index finger is: 4 R F V, but the keyboard you posted suggests a layout: 6 T F C

The latter layout look appealing, and I wonder why is touch typing using the former rule, since it makes both right and left hand move on a right diagonal instead of right-right, left-left.

At a first glance none of them has any visible advantage.

[tempestn]

Seems like the main problem with that setup would be, if you turn your wrists outward to hit the 6TFC layout (and mirror with your right hand), you'll have quite a stretch to reach 'B' with either side. (Otherwise it would be great, as your wrists would be in a more natural position, without the need for a split keyboard.)

[gadrfgaesgysd]

Exactly. Perhaps 'B' is the reason touch typing uses that strange rule. I'm using it, but the 'B' key was still hard to reach and was causing strain. So I remapped it to the right of 'L', where there is basically an unused key( I use 'shift + ,' to get ';' ).

I want to try the layout from that keyboard[0], but I wonder if it would be a waste of time, since it would take at least a month to obtain a normal typing speed.

[0]:http://ecx.images-amazon.com/images/I/71oyo6vGNoL._SL1500_.j...