iOS controller or not, it seems that Apple may indeed have met some devs at GDC, if we were to believe this:
Phil Fish (creator of FEZ) posted a cryptic tweet three days ago about a meeting with Apple, which I thought was weird since I don't think that Apple was officially at GDC.
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https://twitter.com/PHIL_FISH/status/316736139753029633
Note: Phil Fish is a little weird so I'm not sure what to think of it.
Maybe they're trying to get some mac gaming momentum, or maybe some advancements in iOS gaming?