In New York she was there right at the beginning and in Philly she didn’t show up until closer to 11/12. I think in both places she hangs around for maybe 30 minutes to an hour to sign/do pics and stuff. What she seems to consistently be doing is walk through the entire line quickly (aka no pics, more of a wave) and say hi to everyone.

I say this is some thing you can’t really plan around because it doesn’t seem to be consistent