I have so far always used another parking technique: the "minimal dent spot". Living in Europe, with its tiny cars but even tinier parking spaces, I tend to choose the spot where there is the least chance of others parked next to me to slam their doors into my car. But I might now adopt the "face out" technique, since my 20-year old Celica is looking more and more battered (though more and more aerodynamic).
Like golf ball dimples? I hesistate to try that on my car
I also found that article inspiring, nice find MetroMPG