"because all IETF document are examined by IESG"
No they're not. See RFC4844.
Lloyd, it *is* true that all documents in the IETF stream are reviewed
and approved by the IESG. I would take "IETF documents" to refer to
documents in the IETF stream.
(In fact, documents in the IRTF and Independent streams are also
"examined" by the IESG, but only for conflict review, according to RFC
5742. The only RFCs that the IESG doesn't look at in any formal way
are those in the IAB stream.)
Barry, Applications AD