I have seen GIB to raise slams bidden after jump pretty often, which in general is wrong. A few minutes ago GIB raised to grand even after I asked for keycards. GIB holds: Qxxx Kxx K109xxx --- The bidding goes: 2H by opp1, pass by him, 3H by opp2, 3S by me pass, 4S, pass, 4NT, pass, 5nt*, pass, 6S, pass, 7S, all pass 5nt*=any void, even number of KC It's pretty understandable to bid grand if he had two keycards, but having zero it makes it a 100% pass on 6S.