Is this the next iPhone?

Rumour has it that the 6th gen iPhone is going to be released in September/October of 2012, and as we get nearer to theorise months, the leaks and rumours are getting stronger.
Earlier today popular tech blog 9to5mac posted an album of leaked pictures of what could be the next iPhone.
What we can see is a centred front facing camera, smaller charger port, extended speaker and microphone grill, as well as a headphone jack on the bottom. The screen could be 4" but knowing Apple it's likely that it's going to stay at 3.5".
You can have a look at 2 pictures below or have a look at the full gallery on 9to5mac's site.

-Y