I cannot believe there was a long pause before playing the card, but it's entirely possible there was what you call a momentary "hitch". If I had got to the table immediately I would have asked East to repeat the action (perhaps I should have done this anyway), but I still think I would not have got any agreement about the tempo of the play.
I know South as an honest player, but I also know he's frequently on the lookout for any advantage he can get from the opponents' tempo. I imagine there was a slight fumble that could have been attributed to a failure to grasp the card cleanly, or a momentary lapse of attention. I think it's clear to all the players that East can have no reason to think about playing the queen with any holding, but the relevant law (as someone quoted above), says:
Quote
[L73F] When a violation of the Proprieties described in this law results in damage to an innocent opponent, if the Director determines that an innocent player has drawn a false inference from a remark, manner, tempo, or the like, of an opponent who has no demonstrable bridge reason for the action, and who could have known, at the time of the action, that the action could work to his benefit, the Director shall award an adjusted score
It doesn't say that the false inference has to be a sensible one, and I determined that South had drawn a false inference, viz. that the player would have more to think about with Qx(x) than with xx(x). I suppose the offender could have known that hesitating with xx could work to his benefit, if he could guess that declarer might play him for a significant card. I just wasn't prepared to believe there was enough of a break in tempo to warrant such a conclusion, so I ruled that the score should stand.
It reminded me of an EBU appeal
(appeal no.1) in which a player claimed to have been misled by a hesitation where the offender would have no reason to think. He lost the ruling and the appeal, and the commentators were mostly baying for the deposit to be withheld.
If there had been a clear, undisputed long pause I would not be happy in this situation to rule that the score stands. I would consider fining the offender under law 73D, and I would like to award a split score, but I'm not sure that would be legal.