Güllich et al. argue that among elite performers there is a negative association between early and adult performance, a pattern they link to distinct developmental causal mechanisms for early, and adult elite performance. Using simple simulations, we show that this pattern arises naturally from collider bias when selection into elite samples depends on both early and adult performance, and/or from other biases like base rate neglect. We then revisit the data leveraged by Güllich et al. and highlight how in numerous instances early and late peak performance are highly positively correlated. While associations estimated within elite samples are descriptively accurate for the selected population, they are causally misleading, and should not be relied on to infer developmental mechanisms of elite performance without explicit modeling of the selection processm, accounting for base-rates and minding other statistical biases.A Comment on DOI: 10.1126/science.adt7790