Well, DFW 145 is the more senior than ORD and NY. So people just getting to DFW are usually going to have been a NH in ORD or NY. The stagnation over the past four years plus the 175 coming online has caused an uptic in reserve time recently. October we had 1.5 year FOs holding composite lines but In November it jumped back up.
This will change very fast over the next few months. I would be shocked if it was down below six months here pretty soon. Over the course of the next year if there is a delay in the 41st 175 then the 175 might start to stagnate.

If you look at the reserve list and date of hires then there are wide gaps of time for those pilots. In some cases pilots ten numbers apart in DFW were hired over ten months apart. (Not counting pilots who could of held a line but actual forced reserve pilots)