I have just had an online 'Chat' with an AppleStore expert:
So, it looks like the new Apple In-Ear phones will not be iPhone compatible
Hi, my name is ???. Welcome to Apple!
???: Hello, how can I help you?
You: Hi ???.
???: Good afternoon
You: I'm interested in ordering the new Apple In-Ear Headphones with Remote and Mic for use with my first generation iPhone. Will the audio, mic and pause button work with the iPhone?
???: No, it's not compatible with the iPhone
???: However we do have others which are compatible with the iPhone
???: Would you like a link to them?
You: Yes please!
???: Sure
???: Bose® QuietComfort® 3 Communications Kit for iPhone
You: Thanks - I will have a look at those. Bye
???: You're welcome.
???: Thank you for using Apple Chat. If you would like more help, please chat with us again
So, it looks like the new Apple In-Ear phones will not be iPhone compatible