Transit radius as a function of orbital period at 5 Gyr for the four initial entropies s₀,_n = 6, 7, 8, and 9 k_B /baryon. The lower three values lead to virtually identical valley slopes. For the highest initial entropy, unstable initial conditions with Roche lobe overflow result, which strongly removes mass especially at the larger orbital distances. This affects the valley slope. Such a high entropy is, however, not in agreement with the predictions of formation models.