1) Three years as parent advocate.
2) We've had several meetings with a horde of attendees, but we eventually figured out that those were not IEP meetings. The actual IEP meetings featured a select cast of characters: parents, the G/T teacher, and the principal or vice-principal. That's it.
3) It's clear to the school, because they control the process. It's absolutely unclear to the parents, and no attempt is made to make it so. The G/T IEP is a joke, because it's a cookie-cutter form, filled in with what their program is prepared to provide. It's a best-offer, take-it-or-leave-it situation.
4) No. Disagreements are not resolved. Parental input is ignored, though they are willing to schedule meetings where they smile at you and try to make you feel better about ignoring your input.
5) No. See above.