It was always 10:15.
But in iOS 7, they tweaked that icon.
The clock icon now WORKS.
Go ahead… look closely.
The clock icon is now a … well, it’s a clock.
I don’t know how useful this is, because it is much easier to just look at the time on the top of your iPhone, and not strain your eyes looking for the little clock. But, still, it is kind of fun to have a “working” icon.