Bill,
Something is happening in that space (120 seats) with, or without, passage of this TA. The difference is whether we want to go forward under our current contract with 3 to 1 language. The addition of 88 jets if done tomorrow would be close to a wash on new CRJ900's. The TA makes it less painful to restructure DCI, but it will happen regardless... perhaps slower and with more debt which stalls financing of other needed replacements for mainline.
Today's announcement should have been last Thursday at the Bank America presentation. Do not know why the timing has been so awkward.