The flowthrough that we had at Northwest is written in the new contract with the Delta merger. No one has flowed-through yet because NWA is not hiring, and the captains at Compass have not been on property for 30 months to flow-through as written in the contract. Everyone seems to be confident that if the merger is successful and Delta is hiring again, Compass pilots will begin to flow through (the rate is 20 a month).
Of course very shortly you will hear plenty of people complain that flow throughs have a history of not working, and then you'll probably see a post from a L.S. (lisa simpson maybe?) that Mesaba has a flow-through with NWA that allowed something like a whole 10 guys to flow through already.
My advice: if you want to build 121 experience, get hired at an airline that is doing well in tough times, and work with great people, then come over to Compass. If you want to come here for the flow through ONLY, think about it a little harder.
Best of luck.