I could well imagine this, as everytime I've seen her on television, she's always been in a calm and pleasant mood. I've never seen her displaying any arrogance at all. Although, I can only go by what I see on television though. From your post, it would seem this is the true her.
She politely posed for lots of photos and we kept passing cameras and she was very patient. I saw her on Loose Women today and it reminded me how charming and friendly she was to us. Not everyone would have spent that long with about 6 cameras and a bunch of giggling teenage girls.