Originally Posted by
peteq
Or, wait 3-5 minutes, clear class-B and cancel in class-E.
If you're walking with big bags of cash, you don't fire your bodyguard halfway through Central Park.
Anyway, the point of the original post was, do IFR vectors that just so happen to carry you through class-B imply class-B clearance.
Yes, because the aircraft is being operated under an Air Traffic Control clearance.