The context of Pain's statement simply meant that, Jiraiya would go after crippled, Chakra depraved Nagato himself (the secret behind Pain) and fight him, instead of fighting the 6 corpses he controls. That's all it meant. I don't know how you idiots defined it that Pain admits inferiority, when no such thing was admitted. Add the whole Sannin and they still get stomped by Tendou Pain, let alone the 6 of them.