Well, it's a fact that the Nikon D5100 has better image quality *measurements* than the T4i/650D. It's also a fact that in practical terms this means absolutely nothing on its own.
Thanks David for that excellent technical explanation! I've always wanted to hear from someone with the relevant know-how I wonder about the 6D's AF system too, but it seems that on paper it's not entirely pointless. At least if you compare it to t...
Well for a start, why do all their sensors lag so far behind Nikon's? I'm referencing DxOMark measurements here. While DxOMark might not be the most accurate guys around, there still shouldn't be that much of a disparity.