Seems that a lot of people have been put on the shortlist! When I was on the shortlist, no one else from my board (except ground branch applicants) were put on the shortlist. What has been said above is correct, I have heard of people being strung along for as long as 9 months, and then told no. Don't worry, you've shown the board that you can do it, they just need to see what slots they have - it's simply out of your hands now.
Btw, they no longer do the EEG in the part 2 medical - unless they started doing it again in the last few months.
Any other Q's, PM me, as I've been through it all recently.
TMA