It seems not so.
After I opened weak 2D and N raised, I decided to lead the K of diamonds to see the dummy. Then I switched to a club. The contract was never in danger, until GIB carelessly "drew trump" with dummy's 9. Curtains! N got in, cashed the K of clubs and continued clubs, and a typical Flight C player would painfully watch my 8 spot overruffed in front of dummy.