Jim,
the definition of "couple" has been dramatically redefined in recent years so I wouldn't get real excited about trying to mark off two exact weeks, esp. since DL's execs yesterday said they expect a deal to be announced within days or weeks at most.
The bottom line is that both DL and US are apparently willing to agree to a slot trade that is not as onerous as the DOT and FAA originally demanded and that allows DL and US to further concentrate their services at LGA and DCA respectively, and use the slots at both of those airports more efficiently. Removing a bunch of turboprops from NYC airspace is bound to help congestion in the NYC area alone.
This alone will help move more passengers through lga,35 seat props don't belong at a high volume airport like lga which is runway constrained.