I'm unsure this strategy of "placing fingers in anticipation" is how typing works. The homerow-based typing technique typically keeps your fingers fairly well spaced along the entire keyboard. As such, the distance to each key is, for the most part, even. The idea here is that you don't have to place your fingers for anticipation, as they're already fairly close to the next key.

I'm also unsure how that might work. If I were to type "you" with my right hand, and then wait to type out "saw" with my left, the act of preparing to type out the other word would distract me from what I'm already trying to do. Reading ahead makes sense, but I don't know if that usually turns into phyiscal movement.