[BobAliceInATree]

I tested this, and if I have slide-to-type disabled, and slide my fingers, then every letter I slide over will highlight, but only the letter I let my finger up on will show up in the text input box.

If I don't have slide-to-type enabled, then only the letter I press down on will highlight, and what shows up in the text input box is pretty inconsistent for horizontally adjacent letters.