The audit hasn't produced its report yet. They haven't said anything about bamboo fibers one way or the other.

If they had discovered something obvious, it's likely that they would have leaked it (and gotten their report in on time). But I suspect that they'll find something to point out in their draft report due next week -- not a smoking gun, but something sufficient to show that the fraud was just too clever to have left one.

So I'll be curious to know what your conservative friends think when the draft report is released next week. I imagine there will be an HN article about it, so I'll keep an eye out there.