Kishi didn't say that all that, Hiruzen, Jiraiya and A said it from their own perspective.
Madara's name was enough to start the fourth shinobi world war and I don't think Minato has reached that level yet.
Minato can hold his own against many strong shinobi, and he is also very strong.However, he'd lose to Madara after putting up a good fight.
Tobi is definitely Madara (partly, if not wholly).How else does he know everything about Madara, and his past?We also know for a fact that Madara didn't die in that fight.He died sometime later, after he awakened the rinnegan.
The toads say that Sage mode Naruto has surpassed Minato, what do you say to that?
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