I just had an interesting chat with the morning bus monitor. Gus has been able to get out of his car seat and has gotten up, but he only does it when the bus is stopped and they are waiting for the teachers to come out and get the kids. The impression from both bus monitors is that he's really smart and sweet and funny. He's not using any negative language or behavior during his hours with them. This is consistent with the way he generally behaves at home. He went through his phase of 'potty mouth' and occasionally gets nasty, but so does every other kid. Mostly, he's got a very laid-back, likable personality.
So the monitor made an observation about his ear-covering, which he's started doing these past couple of months. She felt that maybe he was just exposed to too much 'noise' during the day and is trying to block it out. By noise she meant corrections, instructions, demands, other kids...It's true that there are a lot more expectations on him than ever and being in a mainstream school building, visiting some mainstream classes (music) may be too much stimulation for him.
I can't argue that even though he wasn't getting as much in the realm of academics last year, he was certainly a happier kid and his staff was happier with him.