The Short Version
No available evidence documents a 13-person questionnaire survey at Wuye Ultra-Modern Market's administrative offices yielding the stated results. The closest office thermal-comfort study in the evidence pool does not reference Wuye Market, a 13-occupant sample, the 46.1% figure, or unanimous afternoon-hottest findings. General Abuja thermal discomfort data makes the claim directionally plausible but cannot verify these specific survey details, and no primary source for the claimed study could be identified.