My recollection of the tempo - reasonable but not excessive pause at trick one, completely in tempo up to the drop of the ♠J, and then the obvious claim. The play to the second round of trumps was quick enough that none of the commentators had a real chance to suggest he could get it right (the possibility of getting it wrong was mentioned). My recollection is that the critical trick was played quickly. Of course there could have been lags in the broadcast that hid the real tempo. Just discussed this hand with West (Simon de Wijs). He got the explanation that Nunes held 19+ so he automatically placed ♦A with declarer. (Of course Nunes' hand is worth 19+ here). Simon took ♠A in tempo. When he played the third heart, Muller threw his highest remaining, signalling ♦A, and it was clear that Nunes noted that. The only explanation Simon could come up with why Nunes dropped ♠J, is that Simon would probably have taken more time to think over the position if he had held ♠AJx. In that case he might have considered that Nunes wouldn't have led ♠K without the ten, and thus that his ♠J was doomed, and thus that ducking ♠A (and then locking him in dummy with a heart ruff) would be an option. You might defend that way with AJx QJxx Qxxx xx for instance. It will take some time. So the fact that Simon took ♠A in tempo might have guided Nunes. Of course he blames himself for not asking Nunes why he played for the drop after the match.