Hi beedoggy,
well first you say:
The aim of this analysis is to find the most consistently profitable playertype. Therefore, the figures we are interested in comparing are the LB values -the mean minus two standard deviations.
The results show that the most successful player types is Semi Loose Passive(pre flop) - Aggressive (post flop). However, there are only 12 players of thattype, and so we are unable to draw strong conclusions.
Of course it is impossible to draw strong conclusions, but in the end of the article you contradicted yourself by doing exactly that: 
Conclusion
The analysis has shown that player type cannot be used to differentiate between winning and loosing players. Groups of players with tighter and/or more aggressive playing styles will have a tighter range of BB100's, but these ranges will not tend to be higher or lower than each other.
What this means is if you become a tight-aggressive player (as recommended by many books), you are no more likely to win, than if you use another style such as tight-passive. Note that the results in this analysis are only for 9player $1/$2 No Limit Holdem tables at PokerStars.
Excuse my mockery of your article, but how can you make such incorrect and misinforming statements about the TAG style!?
Even with a sample size as small as 1000 for the "Tight Aggressive pre flop/Aggressive post flop" players, how can you come up with a mean value of -1 BB/100, deem that value correct and state that TAGs are no longer winning players !?!? That's what I meant by hilarious.
Regards
dRb