From what I've read, studies show that for mobile keyboards, typing with two thumbs is the fastest way to type.
Apparently holding an iPhone with both hands tends to put the thumbs in a better position to hit the keyboard at a good angle for both accuracy and speed. People using a finger often have a much shallower angle of attack that results in more surface of the finger hitting the keyboard......and that leads to hitting adjacent keys making errors that need to be corrected. So they say anyway.
Back in the dark ages when mobile keyboards started to appear, a stylus was frequently used to poke the keyboard.
I can only move my thumbs relatively quickly across an iPhone keyboard, but not as fast as most people. I suppose one of the reasons why people use their thumbs is because the device is being held, it's not flat on a surface. I still agree with you though, a normal keyboard is better no matter what.
Apparently holding an iPhone with both hands tends to put the thumbs in a better position to hit the keyboard at a good angle for both accuracy and speed. People using a finger often have a much shallower angle of attack that results in more surface of the finger hitting the keyboard......and that leads to hitting adjacent keys making errors that need to be corrected. So they say anyway.
Back in the dark ages when mobile keyboards started to appear, a stylus was frequently used to poke the keyboard.