Moshe Yudkowsky wrote:

So if I understand you correctly, you're stating that current the most 
reliable fs in its default configuration, in terms of protection against 
power-loss scenarios, is XFS?

I wouldn't go that far without some real-world poweroff testing, because
various fs's are probably more or less tolerant of a write-cache
evaporation.  I suppose it'd depend on the size of the write cache as well.

-Eric