We're used to seeing lots of Apple rumors. Most of the time they end up proving false, but in this case we might actually see this turn out to be accurate. In the past week, there have been whispers here and there that Apple is planning to launch the new iPhone 5S sometime in August. If this is the case, then the iPhone 5S going into full-scale production now isn't too far-fetched.
Besides that, the source, Macotakara, has been correct on other pre-release Apple details in the past. They say that Foxconn and Apple have finished test runs of the iPhone 5S and that they are in the process of scaling up production. They note that the device will likely end up being very similar to the current iPhone 5S as most of the manufacturing process modifications are hard to find.
Only time will tell if this is true. If it is, we will likely start to see parts of the device leaking out and possibly a fully assembled device.