We don't have a ton of experience, but I've never been in an IEP/ARD meeting that was less than an hour long. Both of the ones I attended were closer to 2 hours. In both instance not all the teachers were able to stay the entire time, but they were there for the important parts and put in their input. Our ARD/IEP meetings haven't been problematic or anything, though. The school/teachers/therapists have agreed with my husband and myself as to what needs to be done for DS10. I can't imagine a contentious meeting being less than 2 hours!