[SI-LIST] fiber-weave effect alive and well?

* I've reviewed DesignCon 05,07 material on fiber-weave effect.
* A 10G (802.3ap) PHY vendor claims their demo setup used FR408 (Dk/Df =
3.77/0.012) for backplane sections and a total channel of 1meter.
* FR408, as far as I know, still has the basic weave/resin construction,
though perhaps less Dk delta.


Q:
1. Huh?  What happened?  Did the PHY vendor call in the wizard kids from
Hogworts?  What is the current reality?
2. Any knowledge of Rogers4350?  Ie: a different construction?  Weave
effect?
3. Up to date publications on this?  (Besides references in the above DCon
material.)

Also, I see no mention of the weave effect on authoritative things from
802.3ap people on commsdesign or elsewhere, from 2004 on.

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