First Fitting Question...

My dress is in ;-)
I just spoke with them today and they told me the first fitting would take an hour and half--is this normal? what happens during all this time?

That is what I thought--but I think they try to do everything-- I have a tank dress but am changing part of the beading or applique not sure what it is called--so maybe they plan on doing that all at once---
We'll see how it goes