110.6. A permanent's status is its physical state. There are four status categories, each of which has two possible values: tapped/untapped, flipped/unflipped, face up/face down, and phased in/phased out. Each permanent always has one of these values for each of these categories.
My rules quote pointed out that status (including tapped/untapped) only changes due to a spell, ability, or turn-based action. "Transforming" doesn't qualify any more than "doing the hokey-pokey".
No, I am not a judge. That's why I like to quote sources such as the rules that trump judges.
Argus_Panoptes has found your answer, unless your friend wants to take the word of two shop owners over the comprehensive rules:
711.7. When a double-faced permanent transforms, it doesn't become a new object. Any effects that applied to that permanent will continue to apply to it after it transforms. Example: An effect gives Village Ironsmith (the front face of a double-faced card) +2/+2 until end of turn and then Village Ironsmith transforms into Ironfang. Ironfang will continue to get +2/+2 until end of turn.
110.6c A permanent retains its status until a spell, ability, or turn-based action changes it, even if that status is not relevant to it.
110.6. A permanent's status is its physical state. There are four status categories, each of which has two possible values: tapped/untapped, flipped/unflipped, face up/face down, and phased in/phased out. Each permanent always has one of these values for each of these categories.
How to autocard (do this to specify a card in your posts): Type [c]Black Lotus[/c] to get Black Lotus . Type [c=Black Lotus]The Overpowered One[/c] to get The Overpowered One .
