Acinonyx - as a secondary teacher I wouldn't make a big deal of this with a new year 7, so I do think that your reception teacher is being a bit mean. I hope your DD is able to be brave and not let it put her off.
Norfolklass - if it was me I'd be tempted to take him home for a couple of afternoons next week. If he's not 5 the school may not like it but he legally does not have to be there. I may end up doing something similar when youngest (end Aug baby) starts next year, as there is no staggered start at all here regardless of age.
Getting to school in the morning is easy for the boys, we are 5 minutes (grown-up) or 10 minutes (toddler) walk away from the village school. I don't take them though, as I have to go to work, so they go with grandma and grandad.
I won't be doing PTA, no hours left in the day unfortunately.
I think his first full week went well, although he did come home with his shorts on back-to-front on Friday - PE was in the morning so he must have been like that all day! He told me that before PE they "went to the hall for singing with the headmaster, then we shut our eyes and put our hands together". That will have been assembly then, I reckon.