yep i tend to use this often when im using someone like Gerrard or Del Piero or my fav Ruben Baraja who bangs plenty of these R2 shots in, skip about and get a bit of space then try a measured shot like these and i find they tend to go to the corners more...eg, a more powerful one floats deftly into the top corner, or a grasscutter using R2 manages to shave the inside of the post for a goal.
Scored one last night in multiplayer actually with R2 which looked like it shouldn't have gone it due to the slow speed and height, but just dipped into the top left corner in time, a fingertip away from the keepers gloves.
I tend to press it before making contact with the ball as i think thats how it works, if you look you can sometimes see the player making an adjustment or sidefooting the ball more than just wellying it with the laces.