I completely agree with you. But it's just one additional variable. There will be future I3G users who will also end up keeping logs, just like many members have logs at the moment. And there will be people who work their asses off, log or no log.
However, when looking at the entire "Team 1" group, I'm sure the success rate will be higher than it would be without the logs and the constant feedback from CS, CT, Tim P and Tim Z.
Therefore I would not look at the "Team 1" results as what will keep happening across the board, but instead at what is possible under good (but not ideal - we still have work, school, families, etc.) conditions. I'm sure Biotest is aware of that, which is why they are approaching it like this.