Okay, first we always need to remember that ‘premeditation’ does not require proof of ‘preplanning.’ Say to yourself quickly and silently: “She saw me so I have to kill her.” That establishes legal premeditation
Courts do look to planning. They look at length of time during which a defendant may have ruminated over the killing, as well as the nature and number of acts committed toward the goal. I doubt a court is at all likely to consider the quoted words as evidence of premeditation. The words are, however, evidence of intent to kill. Those are two different crimes.