Nothing like it, but in some situations it's giving important information and it's easy to see which is the doubt. If the obvious shift is not followed after the hesitation, it's legally ok, and I think it's not right.
I like the auction and see no problem on it. The hand could be cold for 6D and bidding 3NT would be a mistake. Also, 5D could be better, I don't see why any of the players should bid differently.
We see this everytime by many pairs and there's no effective protection from it. The top "bullshit" is the statement: "I'm thinking about the whole hand.". We see many top pairs using what the mistaken regulations allow them to use with the excuse that they aren't doing ...
Playing with me at the Spingold, he smoothly led low from Axxxx against 4S (the only lead that could possibly beat). The hand was played by Bobby Levin - who very well guessed it - having KJxx in Dummy and xx in his hand. We all said the same: "Good lead, Russ ...