Do the models that fled count towards 25% for taking rout test?
Yes, for purposes of rout test count them as Out Of Action. [recommended] OFFICIAL Mordheim ERRATA: Page 38, Voluntary Rout; Replace the paragraph with: A player may choose to voluntarily Rout at the start of any of his own turns if he wishes, but only if he was already required to take a Rout test or if a quarter (25%) or more of his warband are Out Of Action. 5.2 Frenzy OFFICIAL Mordheim ERRATA: Page 38; remove the reference to Terror tests. [Games Workshop Official Mordheim’s FAQ] 5.3 Fear Q: At one point my vampire and three zombies (from 1 henchman group) all charged the Orc Boss. In that case should he: a) take 4 fear tests; b) take 1 fear test; c) take 1 test for the vampire and 1 test for the zombies. A: He must test for each charge that is declared, although there is no need to keep testing once he fails one. A horde of shambling zombies is more terrifying than one on its own, I guess.