What a fright. Seems from first impression that there was a 'confirmation bias' strong withe the controller re: SW , in that that outfit is 'usually' fastest around the field and so 'should' have been off and away in plenty of time before the FDX heavy was over the keys? Day in - day out ops and it seems small biases creep in which are only brought to light in cases and challenging conditions such as these.
Btw, I think the SW was far faster than 48kts some are quoting from FR24. The FR24 data is a good 20 - 30 seconds behind the audio, so am certain SW was just on or past V1 even by the time the FDX called abort.