I could have written this post for our son.

All the best for your teacher meeting - the portfolio really does help, but be prepared to hear things like "building good foundation" , "fine motor skills essential for development later", "age-related", "not what we are experiencing at school", "let him be a kid/don't push him" etc. And you will get more irritated and feel slightly befuddled and suddenly may wonder if you really are missing something/overreacting.
DO NOT GIVE IN! Sure be polite and allow her the opportunity to tell you what she sees, and then use the school's own phrases (use their prospecus book/sheets and website correspondence to get some goodies) to show how you expect them to differentiate to meet his needs.
And yes - isn't that book just amazing - I just finished it too!
all the best for your meeting - and please let us know how it went