Suggest to post that when they speed up the production tracks (really? I thought they'd want to slow it down, to match the 100 fps video  with 29.97 playback... anyway...)  ... that when they speed-change the production tracks, they use a phase vocoder rather than a conventional pitch shifter. I've found that to be a lot more effective and intelligible with mass speed shifts on dialog.   Of course this is an ad shoot, so you might not have access to the post people. Or even to the agency produ