Two experiments examining repetition priming in face recognition are reported. These employed 8 rather than the more usual 2 presentation trials allowing the prediction made by Logan's (1988) instance model of power function speed-up of RT distributions to be examined. Both experiments (the first repeating the same photograph on each trial, the second varying the pose) showed; repetition priming effects for familiar and unfamiliar faces, power function speed-up for both mean and standard deviation of RT and power function speed-up of the quantiles of the RT distributions. It is argued that the findings are consistent with the predictions made by the instance model and provide an explanatory challenge for alternative theoretical approaches.