Good point about the lower level IA. I expect 1.9 to have the mentoring system be available as well with the new IA and probebly a 10man raid.Nope you misread it. Those were xpac milestones. MS1, MS2 etc. (This is internal dev jargon for progress milestones on the expansion, they probably have internal progression points they want to hit to meet whatever their intended launch is, from the whiteboard it doesn't look like it will be this year, beta maybe tho.) But they were unrelated to the content for the various patch. And although Mentoring was listed as 1.9, that doesn't necessarily mean it will come in 1.9 if its not ready, but I've heard its already being tested internally so I wouldn't be suprised to see it on the PTS in the next week or so. Besides don't you remember that Scott Hartsman already said it was coming soon in the SOG address? I think we have seen most everything he talked about except mentoring and the pvp changes, but I'd have to check the post.
Still its highly highly unlikely they would have 1.9 without mentoring cause they already let it slip that IA's for lowbies is coming om 1.9. Why would you waste all that time or manpower on something that a very small portion of the playerbase would use unless you had a mechanic (mentoring) that made it usable and useful to all players.