I noticed the same at the Chicago Auto Show last February. The Porsches were unlocked and anybody could climb in any car (except the CGT). My wife did, liked it, and now we'll be buying one next year. Additionally the salesman answered our questions, popped the trunk and ballparked cost of ownership issues (though perhaps being more concerned about the trunk size than 0-100 times shows a level of seriousness).

Score one for the open door policy.