I just got back from Charlotte. Great group of people. They made me feel relaxed. Mostly TMAAT questions, a few technical from Jepp plates and charts. I was the only one there at the time of my interview. When I finished, somebody else came in to interview but I did not get a chance to talk to him. They pulled him in to fill out paperwork right after he got there.
As far as competitive times I don't know. I was curious to know myself. I only have about 46 hours of jet PIC. The resume they had in hand during my interview was not my current one. I recently upgraded, so I gave them a new one and only then did they find out that I am a Captain at my current job. I do have 7 years of 121 time and some DC-10 SIC time.
I do not know anyone, did not get any help from anyone at all. I was completely surprised when they called my last week for the interview.
If you want to work for them, just apply online and keep updating your app. That's what I did.

Best of luck.