Sorry, that's not quite the case.
In the previous MK shows (prior to Wishes,) Tink would fly before the fireworks began.
But, in Wishes, she has a specific place to fly DURING the show.
It's toward the front of the show, but many fireworks have gone off and we are into the show before she is given her "cue" in the soundtrack to fly.
BTW, she does not ALWAYS fly.
Due to poor weather conditions or other situations unknown to guests, Tink may not appear in the show.
The "cue" in the soundtrack is not specific enough that (if you don't know where it comes) you'd not know that the Tink performance was missing.
Here is a complete video recording of Wishes that I made with 6 camera
locations.
Tink's flight is featured just past the 2:30 mark in part 1.
Wishes (in 2 parts)
http://www.youtube.com/watch?v=Mdrj_yqyPjI
http://www.youtube.com/watch?v=a8g_G_5pfFQ