I use them often, Graudian. Everyone is called to the gate at the same time but there will be two well signed queues both for checking in and boarding....she will use the one signed...Speedy Boarding....unless things have changed since last month!
As Islay says she can say she will need help boarding.....remember....they want to get loaded and in the air quickly....they will do what they can to make sure that happens.....☺
There is a website where you can look at a video of the boarding process which "should" put you at ease.....x