I think a lot of people are afraid of being humiliated because of low 3d mark scores so they try an older version. If your card cannot run 05/06 at all then sure try and older version but otherwise just use 05 since it will make use of all the features of the card unlike 2001 which was optimised for the top cards at the time.
Also, who cares if its a low mark - its just a number! If it plays all your games fine then no need to worry
Most people on this forum know a bit about PCs so they upgrade more regularly than the average user, even the people who may think they have low scores will have better hardware than typical users who just get a dell every 5 years. But your never gonna get a higher score than the guy who upgrades every 2 months!