I love that the guy from intergroup said usually 1 year but you are doing so great that the rules do not apply to you, AA is so inconsistent! I went through the same thing after 6 months sober but i sure as hell wasn't doing as much service as you are which is a good thing for you provided you keep monitoring how you feel and don't take on too much.
There is a theory that seems quite sound and that is a person who is fresh sober will be able to relate to someone with 6 months or a year clean time more than someone with 25 years so personally i think you do have something to offer at 6 months as you have started working the steps, this will be even more apparent to you after you finish your step 5.
Good luck on the new commitment and kep working through those steps as quickly as possible:-)