The director got snippy, responded that he rejected their “hypothesis” and didn’t elaborate.
So we’ll have to wait and see just how many times Robbie’s Sharon Tate actually speaks.
That said, it is worth noting that Once Upon a Time in Hollywood premiered at the Cannes Film Festival last month (if you were at that screening, don’t spoil what happens!), and afterward, a reporter questioned Quentin Tarantino about why Margot Robbie didn’t get that many lines.