on my iPhone it takes about a minute to open my itinerary, about twice as long as it used to.
My biggest grip is that it now takes over 6 minutes (you read that right SIX MINUTES!!) to open the seat map for a flight, even when I have two bars of cell coverage and am connected via Wi-Fi
I work in the software industry, and if I delivered this kind of 'performance enhancement' to one of my customers, I'd be out looking for a job right now