I type texts considerably faster when using both hands, much like I do when I'm typing with two hands on a PC keyboard. It's more than double the speed.
Incidentally, I've been using the Peter Gunn Theme from
Blues Brothers as my ringtone. I also have Imperial March, Flood (by Jars of Clay), Pressing On (by Reliant K), Arman Katchuturian's Sabre Dance by Empire Brass, Will Not Fade by Audio Adrenaline, and End of the World by dc Talk.