No. Law 73D1: It is desirable, though not always required, for players to maintain steady tempo and unvarying manner. However, players should be particularly careful when variations may work to the benefit of their side. Otherwise, unintentionally to vary the tempo or manner in which a call or play is made is not an infraction. Inferences from such variations are authorised only to the opponents, who may act upon the information at their own risk. Law 16B1(a) and 73C also need to be considered: Any extraneous information from partner that might suggest a call or play is unauthorised. This includes remarks, a question, replies to questions, unexpected alerts or failure to alert, unmistakable hesitation, unwonted speed, special emphasis, tone, gesture, movement or mannerism. (a) A player may not choose a call or play that is demonstrably suggested over another by unauthorised information if the other call or play is a logical alternative.
73C: When a player has available to him unauthorized information from his partner, such as from a remark, question, explanation, gesture, mannerism, undue emphasis, inflection, haste or hesitation, an unexpected alert or failure to alert, he must carefully avoid taking any advantage from that unauthorized information.