Dave Butler wrote:
John Clonts wrote:

snip

Later I thought that maybe the tower didn't realize I was IFR when he
cleared me for takeoff, and that fouled something up with departure.

snip

This is an interesting thread. I'm based at a class C, RDU,
Raleigh-Durham, NC, and I've never had that happen, and I've never
informed tower that I was IFR. Never heard anyone else do it either.

Same here. Hard to believe that the tower wouldn't have some indication
of the flight plan type, but sounds like maybe not.

Matt