I was fortunate to be pre-selected back in March for Aviation. My OSO was saying that it would be convening around now. It took exactly a week for me to here back. As far as the competitiveness it can't truly be judged based on the selection rate of the 219 board for those of us pre-selected, however here are some of my stats off of the top of my head anyway.
Male, non prior, 27
ASTB: 7/7/6 OAR:59
ASVAB: 99
Bachelors of Mechanical Engineering University of Delaware
PFT: 264?
Strong LORs from employer, E8(Retired) w/ O8 Endorsement(Retired), Martial Arts Instructor
Good luck everyone.
Hope to meet you all there!