Intel ICH8/ICH9 and SATA versions

Intel is naming the SATA-IO versions as SATAII or - even more simpler - as SATA 1.0 + Extensions in the technical documents for ICH8 and ICH9. Does anyone have deeper knowledge about the exact SATA versions in ICH8 and ICH9? SATA 2.6 has been introduced in March 2007. Is it part of ICH9 already? Thanks so much.

Read up on the datasheets on Intels site?

Yes I did. Those are the sources I mentioned in my op.

Anyone knowing this?