I've seen more 5s with this problem than the 5. The 5 was more 50/50 (although with all the ones I had, it was more like 95% interlaced, but go figure).
With the 5s, every single one in the store has had it to some degree. It's become so much of an issue, I half expect the iPads to have interlacing as well and leave surprised to see the panels on the iPads are so much better than in the iPhones.
My anecdotal observations were done from iPhone 5, 5s, and iPads from friends and in these stores: Best Buy, Futureshop, The Source, and Apple stores.
With the 5s, every single one in the store has had it to some degree. It's become so much of an issue, I half expect the iPads to have interlacing as well and leave surprised to see the panels on the iPads are so much better than in the iPhones.
My anecdotal observations were done from iPhone 5, 5s, and iPads from friends and in these stores: Best Buy, Futureshop, The Source, and Apple stores.