Don't bother applying if you are over 45 YO.
I applied 3 years ago. I felt I did the interview part extraordinarily well and the paper test was 100% correct. When they called me 2 weeks later to tell me they were not pursuing me further I took an opportunity to ask them why, after all GUYS shouldn't we have the right to know why?
The HR person hesitated for about 10 seconds and then said I was under qualified, I then mentioned "even with 9 years experience?" and then asked them what I could do to improve that for the next time. She then stumbled all over herself trying to right the statement and couldn't but quickly thanked me for meeting with them and wished me luck.
A friend of mine who is in HR asked me what the average seniority of AS in DX was and I said 17.5 years. He said DUDE its likely because of your age and sad there is no way you can prove it. They want likely 27-35 YO to start so they can keep them for at least 20 years.
I applied today anyhow to see if they call me back, hopefully the three crumb jobs I have taken since then will not make me look like I am a job jumper.