The iPhone 5 is a wonderful example of Apple getting off to a bad start. The iPad Mini with a garbage screen is another example.
Don't confuse launch sales with long term success because the two are not the same.
I totally understand that the iPad mini has sold well and that the iPhone, initially, sold very well. However, that's not the point...the point is that a significant number of people have not been satisfied with their purchases of these products and it's becoming apparent that there are better choices out there.
You want numbers to back that up? Here, check this link. It's pretty clear that iPhone has fallen from its perch atop the smartphone market.
http://www.eweek.com/mobile/samsung-selling-190k-galaxy-s-iii-smartphones-each-day/
Not everyone needs a high resolution, retina screen for the device to be functional for them. I know many people that have bought the mini and are extremely happy with the purchase, albeit a small sample.
Regardless, it will be interesting to see Apple's earnings when they announce it.