Jim Carter wrote:
Maybe I'm confused too, but I thought we always told Ground Control that we
were ready to taxi IFR or VFR, especially if we picked up our clearance from
some other controller. Is this no longer the norm?

Nope, not at Dulles. The guy who gave me my clearance has dropped the
strip down the rack by the appropriate ground controller. The call
is usually "Dulles Ground Navion 5327K TAXI". They already know where
I am and obviously where I need to go.