Confirmed: Apple's A6 uses triple-core GPU
arstechnica.com
arstechnica.com
"That's not how we measure a GPU"
I.E. The number of cores in GPU is mostly irrelevant compared to its performance, which is much more relevant.
It's like counting the Output pins on the CPU - Let's say you have a 722 Pin micro-PGA package. I guess it's interesting trivia, but isn't anything that tells you much about the processor's power/utility in and of itself.