well alcohol has a tendency to relax your muscles. Where as a sober person tends to tense up right before any kind of accident, someone who is intoxicated remains somewhat relaxed.
Which is why, most often in accidents resulting from a drunk driver, and another person, the drunk driver, more often than not either isnt dead, or not as badly injured.
However with that said, the other driver could have also been overly tired, or had a medical problem which caused the accident. Simply blaming it on alcohol when not all the facts have been released isnt 'right'.