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Well, these tests were performed using ext3, from today's point of view a rather obsolete file-system. It will most likely completely replaced with ext4 by the next batch of the major distros (doesn't Leonidas already have it as default?).
From the little reading I did I understand ext4's delayed allocation solves the problem of secure vs. fast, or at least mitigates it.
Which basically means, complaining about the changes in ext3 is pointless. Maybe it's exactly _because_ ext4 will soon become default that the developers allow themselves more room in improving an otherwise broken situation (just look at some of the horribly slow benchmarks Linus / Jens Axboe posted). If your data is really important to you, back it up, or tweak the file-system to quasi 'do it for you'.