Strange. Maybe I missed it but as I read it, there was no record on the FDR of T/O Config Warning.
However the crew stated that the T/O Warning came on at around V1. The PIC then wasted a couple of valuable seconds dicking around with the speed brake handle to ensure it was in the detent and to no avail before initiating an RTO. Some people refuse to believe the numbers and think they know better, I guess.