Yes, the difference in the GPUs are big but thats the point I raise.  MS has about 6 co-processors they are not talking about.  Without knowing what these processors do, who knows how much offloading of graphics can be done on the X1 to releave the GPU and even the CPU from their task.

The problem with only comparing the GPU and not the entire system is that people who are not coding to both platforms do not know if other parts of the hardware play a role or not.  Co-processors are ways for custom designs to offload that processing from the CPU and GPU.  This is why its not evident yet eactly how this might play out.  MS might have felt its more efficient to offload specific intensive processing to specialize hardware.

As for memory, it wasn't the expense of the memory but the timing.  MS designed their system for 8GB way before 8GB of GDDR5 was possible to fit within the console.  Do not forget that Sony was rumored to be supplying 4Gb before Samsung was able to produce 512mb chips which allowed Sony to increase the memory to 8.  MS already designed their system for 8GB and needed ESRAM to fill in the bandwidth part.  Since this was already done, there was no changing the system once 8GB of GDDR5 was possible.  The latency part will come into play for anything that cannot be offloaded to the CU.  Since the CPUs are weak anyway, the latency can become a problem if there is to much CPU task that require lower latency than bandwidth.

The NDA stuff is concernign the rumor that is going around the dGPU.  I was only mentioning it because people kept saying that MS would be telling the world they had this chip but the rumor already covered why this was not happening.

As for what Albert is talking about, he is stating that raw physical numbers (mainly the GPU) does not tell the who picture.  There are other parts within the X1 that make up the difference.  Only way we will see that is in the games.

Don't Alberto's statements more or less confirm there isn't a 2nd GPU? I mean, having a whole second GPU in the Xb one would not just bring hardware parity to PS4 but would take Xb one well beyond PS4, unless it was the shittiest, cheapest GPU available on the market today which only boosts Xb one performance about 30% or so.

So I take those statements to mean that the specs out in the public are pretty much the specs for Xb one, and that it's all about maximising the use of the hardware through brilliant programming and software design.

The dGPU rumor states that MS is under a NDA concerning the inclusion of the dGPU.  The NDA is from AMD.  AMD will be presenting their next APU/GPU on Sept 29th.  If MS has this peice in their X1, then they cannot make any statements about it until after that date.