Could be. Mobile Safari uses pipelining, so for Apple there's not a lot of benefit from HTTP2. It isn't a big enough deal for them to push a new protocol, like it is to say Google that doesn't have pipelining in their browser.
Sorry, but that doesn't make a lot of sense. Pipelining is far from a replacement for HTTP/2 as the document explains a bit. Besides, Safari already supports SPDY because of this.
Apple has already committed to (and rolled out support for) SPDY. If you have iOS8, your Mobile Safari can use SPDY. Presumablely they will shift to HTTP/2 as well.
